"(T)o say that the individual is culturally constituted has become a truism. . . . We assume, almost without question, that a self belongs to a specific cultural world much as it speaks a native language." James Clifford

Wednesday, May 6, 2026

Nietzsche on Promise-Keeping: Sex and Relationships

Distaste for and even anger at pathological liars is deeply engrained in human nature; nobody appreciates being lied to unless liar’s motivation or act is in one’s interest, rather than just in that of the liar. Less firmly etched in human nature is the act of will to keep promises—to hold oneself as being capable and willing to voluntarily keep oneself from breaking one’s word by going instead for some momentary pleasure (for oneself). Those momentary, proximate instinctual urges that prioritize the moment over the future (e.g., keeping one’s promises) are, according to Friedrich Nietzsche, more natural than is the opposing effort to hold oneself as reliable. Trusting other people is thus something that results from the long maturation process that took place in our species’ long prehistoric time. Even though reliability and the related trust can by now be achieved by the strong, hence likening them to ripe fruit on a tree, it is not difficult to find examples of the weak who lie on a regular basis to get what they want from other people. It is natural for the strong of will, who are sovereign enough as individuals to keep their promises as if doing so were a necessity rather than voluntary, to keep a pathos of distance from the pathological liars. This is true in romantic relationships as regards the difficult topic of sex with either promise-keeping as a means of establishing and maintaining emotional intimacy or lying as a means of putting momentary urges first. I contend that Nietzsche’s philosophy is in favor of the former and against the latter, though with an important caveat that keeps him from advocating monogamy. 

I remember three people with whom I associated in my life, one of whom I was actually engaged to, another who was briefly a roommate, and a third who kept himself at a distance emotionally. All three come to mind now because they lied so often to me, even concerning very trite matters. Besides manipulating people so as to get what one wants out of them, lying is expedient and thus the practice can backfire in the course of a friendship, family-relation, or romance. Strong individuals, whose strength of will they make so hard regarding promise-keeping that they can be relied upon, and thus trusted by other people, naturally resist being maltreated and even infected by the weak. As if weakness were a sickness, Nietzsche advises the self-confident strong—the healthy—to stay away from hospitals that contain sickness. Even if the strong by analogy cannot become sick, they can be entrapped and beguiled by the weak and thus voluntarily renounce their innate and built-up strength.

Kant also refers to promise-keeping as being of value, and even argues that rational nature itself is capable of achieving the necessity of a law in holding oneself to one’s promises. As rational beings, we should be taken not just as someone else’s means to their ends, but also as ends in ourselves.  Why?  Because it is by reason that we assign value to things (and to people), and so reason itself has absolute, or undefined value. By analogy, the sun’s brightness is undefined or absolute in being the source of all of the reflected sunlight on Earth. Of course, manmade brightness exceeding that of the Sun itself would place the latter in a relative rather than an absolute position. My point is that, along the lines of Plato’s Republic, wherein reason rightly (i.e., justly) rules the passions, we can use reason to hold ourselves to our promises even when momentary passions tempt us to expediency in satisfying whatever instinctual urge, including lust, happens to be most pressing at the moment.

To Nietzsche, the substance of thoughts consists of instinctual urges, which can be directed along the channels laid out by reason, which itself is really an instinctual urge. Plato’s reason-controlling-passions becomes some instinctual urges mastering others by being more powerful. This does not necessarily mean that momentary urges that tempt us to violate our promises are preferable, according to Nietzsche, to the strong, autonomous individual who fortifies one’s desire to keep one’s promises. On the contrary! To be able to be regarded by other people as reliable, and thus as trustworthy, is mark of strength in Nietzsche’s sense of the word. For our species to have reached the point in which some individuals could by the mental force of sheer will-power hold themselves to their promises as if human nature had a certain built-in necessity for promise-keeping (which is not the case) is the product of a long prehistoric time in the species’ development. Such ripen fruits may seem to be innately ripe, but, given human nature such as it is, the ripening took effort, just as keeping one’s promises in the face of seemingly insurmountable urges does. To Nietzsche, both on the level of the species and individuals, such effort is of value.

It is remarkable that particular individuals differ so very much in terms of being willing to keep promises or to actively choose to indulge in momentary pleasures that violate one’s promises and even lie about having done so! The gulf is indeed sad, given that reliability and trust must be in the soil for a couple’s roots of emotional intimacy to grow long and deep underneath. Any viable relationship must endure through dry stretches in which promise-keeping is difficult, but it is precisely during such periods that the roots grow deeper. Contrast this with seeds thrown on dry rock!

In terms of dating, or “seeing someone,” and even in having a girlfriend or boyfriend (i.e., an enduring romantic relationship), I have been struck by my observations that the promise-keepers tend to occupy one orbit, while opportunist “cheaters” and their enablers are in their own orbit. When a person from one orbit traverses into the other without adapting to its norms and values—to its level of energy—mental explosions can occur and may even be quite likely. Being used to people who have integrity, a person may impulsively bolt from even a beloved whose definition of commitment excludes any circumscription or mastery of immediate impulses for momentary pleasure even though they could be expected to sabotage any genuine relationship. From the other direction, a person used to being able to have sex separately with whomever, whether with or without romantic connection, while still being able to have the benefit of a romantic “relationship” may reject a promise-keeper who rejects the utter lack of commitment and return to enablers who accept (and even adopt) such behavior.

Imagine on a second date (or “hook-up”) with someone, being immediately told, “I’m tired because I spent the whole night awake having sex with three other people, so I can’t spend much time with you now.” My point is that from the standpoints of Nietzschean strength and weakness, the person who expects acceptance of one’s own self-centered and disrespectful behavior and the person who accepts such behavior are in an orbit that is a pathos of distance from the other orbit in which such behavior would be regarded as a huge red-flag.

In the other orbit, a person who states, “I’m afraid I might be unfaithful,” really stands out as dangerous emotionally and is thus instinctively avoided, whereas in that person’s own orbit, the other person might say the same thing, such that both people would be fine with mutual cheating at the expense of emotional intimacy. Indeed, such local (or sub-local) cultures have existed such that relationships endure without commitment because that is the widely accepted norm that relationships should be as such. The two orbits are indeed worlds apart, yet both contain the same Grundlagen of human nature.

Nietzsche is not a relativist on the two orbits. Promise-keeping is a legitimate exception to the general use of forgetfulness, which keeps people from ruminating on past emotional injuries and thus being able to be in the present and even hope for a resplendent future. Unlike the case of romantic relationships (before as well as during a marriage) that lack commitment because they are “open” and “poly-amorous” sexually (and emotionally!), having the strength of will to keep one’s promises even when doing so is difficult or inconvenient is something that requires significant effort rather than being raw in human nature itself and thus natural. Put another way, a strong, self-confident, and resilient will is superior to a weak, selfish, and expedient will. To a person who is used to being able to keep one’s promises and thus holds oneself as deserving the same from others, especially in intimate relationships, a person who refuses or is unable to keep promises spells nothing but recurrent emotional pain. It is on this basis that the strength of will can be found to thrust away from the tremendous gravity towards the other person that goes along with falling in love. Indeed, it is astounding that an instinctual urge of such power exists that can overcome, by mastering, the urge to be with a beloved even if pushing away is known to be in one’s own good.

Such opinion-laden fluff as I have infused above (though actually from below, in part out of ressentiment from past, unrequited injuries) to illustrate my rough description of Nietzsche’s theory on promise-keeping is easy enough; it bears on me now—as if my will had the necessity of a law bearing inexorably on myself—to provide textual support for my thesis.

“To breed an animal with the right to make promises—is not this the paradoxical task that nature has set itself in the case of man? is this not the real problem regarding man?”[1] The task is paradoxical because promise-keeping is not as natural—in human nature itself—as is prioritizing instant gratification and thus momentary pleasure, which eviscerates promises because they involve prioritizing the distant—the future—over the moment. The willingness to so prioritize is what distinguishes and separates the two orbits—the two worlds of interpersonal relations. Behind promise-keeping is “a desire for the continuance of something desired once, a real memory of the will: so that between the original ‘I will,’ ‘I shall do this’ and the actual discharge of the will, its act, a world of strange new things, circumstances, even acts of will may be interposed without breaking this long chain of will.”[2] Parsing this difficult passage, the original “I will” is short for “I will make and keep promise X.” The “I shall do this” is a statement of recognition that promise-keeping extends out into the future, so actual discharges of the will, and the respective acts thereof, in a future even of strange new things and circumstances, will not break the long chain of willing in line with the promise. Circumstances in the future unforeseen when the promise is made do not justify willing (and thus acts of will, such as having a sexual affair) that violates keeping the promise (e.g., to one’s spouse).

One woman’s boyfriend, for example, who in the future meets a beautiful young woman and she who drops her pants as an obvious invitation to a man to cheat on his girlfriend does not justify the man’s use of his will to break his promise. He is advised not to return to his girlfriend to explain to her, “I had not met the young woman when I promised you that I would not have sex with other women.” Neither would, “But the woman and I bonded before I knew you, so you can’t really object to me doing some molly and messing around with her when she visits the city.” Of course, facing such a warped justification, the girlfriend should bolt rather than be so very rudely maltreated by a boyfriend who really doesn’t care for her anyway as evinced by his easy willingness to inflict emotional pain in the distended use of his inordinate power in the relationship with someone who loves him. Should he punish her for loving him? Perhaps he loathes himself (and justifiably so!) and thus does not feel worthy enough to receive the kind of love-of-personality that can be healing such that his self-loathing could justifiably ease and he could thus love her back. I contend that self-loathing is a salient feature of the orbit inhabited by the weak-willed creatures of deceit who relish dominating and thus hurting people of the other orbit in order to feel pleasure from the will to power.

Aristotle’s notion of misordered concupiscence applies to such a boyfriend because people who put momentary, even strongly-felt urges for sexual pleasure above maintaining a chain of willing that is in line with a promise, which itself supports a relation of emotional intimacy, put a lower good above a higher one. 

Nietzsche is more complicated. One the one hand, he maintains that promise-keeping, especially by a will that is hardened such that the keeping has the necessity of a law binding on the will even though this is done voluntarily, is superior to human nature in its raw state without such fine breeding as has enabled the strong among us to make and keep promises rather than be primitive, utterly untrustworthy creatures of proximity. After all, the spite of such creatures that is instinctively inflicted in the face of relational resistance can really hurt.  

However, lest we conclude that Nietzsche is claiming that promise-keeping is superior because it is a moral custom, he looks back to the ancient Greek and Roman conquerors and notes approvingly that such strong, self-confident men were justified, given the very notion of strength as self-confident rather than cowering power of overcoming obstacles whether internal or on a battlefield by mastery rather than repression, in periodically leaving the cage of societal convention to conquer by fighting, pillaging and even raping along the way. Even their wives would have known that such natural “breathers” from the societal (and relationship) norms and mores befits the nature of strength and thus is justified. Even though promise-keeping is a bred refinement of the will rather than a product of social convention (or innate to human nature), a conquering victor enjoying the spoils of war even sexually is an exception outside of the long chain of the will that is in line with keeping the promise of marital fidelity. So, it is not that going to war justifies sex with the conquered because that lies outside of society and thus its conventions; rather, Nietzsche is asserting that the very nature of strength, out of which the will engaging in promise-keeping is possible, requires that the strong be periodically let out of artificial societal cages of convention. 

A certain freedom goes with innately human strength. “The knightly-aristocratic value judgments presupposed a powerful physicality, a flourishing, abundant, even overflowing health, together with that which serves to preserve it: war, adventure, hunting, dancing, war games, and in general all that involves vigorous, free, joyful activity.”[3] To circumscribe all these to fit within societal conventions would be to tie up strength as if in a dungeon. “To demand of strength that it should not express itself as strength, that it should not be a desire to overcome, a desire to throw down, a desire to become master, a thirst for enemies and resistances and triumphs, is just as absurd as to demand of weakness that it should express itself as strength.”[4] Strength and weakness are truly antipodal in Nietzsche’s philosophy, as well as being central to it.

To be sure, societal convention may even have ways in which such strength can be expressed without having to go to war. Once I went along with a remote acquaintance whom I had just met asked me to come along as he looking for a two-bedroom apartment. Initially unknown to me, he wanted to use one room as a sexual dungeon. I was surprised when he admitted the intended use to me, and I joked to the real-estate agent that, were I looking for an apartment, I would want one in a quiet building elsewhere “because he has wild parties.” The acquaintance, who was in my brief time of knowing him very careful to keep his true self hidden from me, rolled his eyes spontaneously—it was so cute!—as if the gig were up and he would not even be offered the apartment. In Nietzschean terms, rather than being willing to flex his muscle by becoming master in order to overcome resistance in the form of another person’s resistant will, he relished weakness because he got pleasure from being dominated and even physically hurt as if he deserved it. Such weakness as wallows in its own kind of languid power cannot constitute strength.

As a side note, the ancient Romans admired men who played the active role sexually with other, usually younger men, but disdained the men who played the passive, “bottom” role because that evinced being dominated and thus weakness; the ancient Greeks were of course fine with both roles, as evinced in the Iliad.  Secondly, it might it be that constructing a dungeon so as to dominate and thus express innate strength albeit within a (marginal) societal convention rather than on a battlefield is something that Nietzsche would have applauded because strength would be expressing itself? If so, then such an occasional expression of raw strength within a societal context, rather than exogenous to one, could be compatible with keeping a promise to be monogamous. In short, strong people got to let off some steam once in a while, and this need not be incompatible with achieving and sustaining emotional intimacy romantically.

Therefore, as I read Nietzsche, he is not defending monogamy though if that is a promise made it is of the nature of strength to keep it in normal time (i.e., except when conquering beyond society’s walls). In practical terms, this could mean that even an otherwise monogamous couple would agree to each person being able to occasionally have “nights on the town” that include drinking (or getting high) with sex with others while still counting the promise of monogamy as being kept. Such “breathers” for our animal nature Nietzsche favors because societal convention is like a cage and thus is not completely compatible with our very nature. This is very different than the boyfriend mentioned above who often has sex with other women and even some of whom he feels an emotional connection with

The weak person “is neither upright nor naïve nor honest and straightforward with himself. His soul squints; his spirit loves hiding places, secret paths and back doors, everything covert entices him as his world, his security, his refreshment.”[5] His warning that he might engage in infidelity is perhaps his most honest statement, for it proclaims a weakness of will and a refusal to master (not repress!) sexual urges as they arise in the future apart from any natural coupling. Give him credit for his momentary fit of honesty, then bolt, for he does not even care about himself. His coldness even to a woman who loves his personality even with all of its dents and still wants to be with him nonetheless can ironically be warmed by just such now-absent love, yet this he rejects in favor of his urge to fuck whenever and whomever he wants, even in the bed he shares with his wife, under the idol of momentary pleasure, as if commitment (i.e., promise-keeping) were a dirty word—or feared. Mastering this fear by overcoming it honestly, with the help of love, which Nietzsche doesn’t mention, could, I submit, strengthen a weak (which Nietzsche also doesn’t mention) such that such a boyfriend could be in an emotionally mature relationship rather than always running away by dropping grenades along the way to distance the women who love him.

The sex of victorious noble conquerors whether to willing captives or even by dominating them by raping them in Greco-Roman history was not done with emotional (e.g., “poly-amorous”) attachment and neither was it done often, so I would be surprised to discover that the wives felt that that their relationships were threatened by the extra-societal expressions of raw strength or even regarded them as breaking their respective husbands’ long chains of will in line with fidelity. Just because Nietzsche writes positively of the ancient noble values such as courage and self-confident subduing and castigates modern morality that opposes such values does not mean that he applauds men of the sort who incessantly lie, including on having separate sex with other women—even those with whom a connection or emotional bond has been made—or demand acceptance of that behavior as if it should be required in order to be something more than friends with sexual benefits (i.e., a couple).

Nietzsche trumpets the ancient noble values of honesty and honor, and thus integrity too, rather than a life spent prioritizing the primitive sexual urge for momentary pleasure without regard to keeping promises that are in line with not hurting those whose love can make life worth living. Strength is in line with having an emotionally-mature significant relationship, whereas weakness of the will is not. Indeed, the very nature of strength means that a romantic relationship with deep emotional intimacy need not be completely monogamous, and thus entirely within societal convention. Yet this is not an open invitation to the selfish and weak-willed to flaunt convention daily in a way that expunges romantic intimacy whether by lying rather than keeping promises, or demanding that an addiction to sex be accepted as a condition for being with the person romantically. Whereas the strong are free, even from time to time from societal convention, the weak are slavish, according to Nietzsche. Because strength and weakness are for Nietzsche ultimately physiological, he does not allow for healing and thus for strengthening. The healthy are healthy even when the weak who seek to dominate even the strong out of ressentiment beguile the strong so they will voluntarily relinquish expressions of their strength in overcoming resistance. The weak are innately ill-constituted, but are they really? 

I would rather hope that the selfish boyfriend who exploits his girlfriend or wife so he can satisfy his sexual urge in any way he wants at the time can find it within himself to pull himself up even if he is afraid to ask his partner for help. I would like to hope that emotional intimacy can furnish a context in which a weak person can become stronger—from within rather than from someone else’s emotional urge to rescue or save another person so to gain more self-esteem. It may come down to the fact that a minimal amount of self-esteem is requisite to being able to tolerate and maintain emotional intimacy with another person without sabotaging every relationship that comes down the pike. In other words, a certain amount of self-esteem may be necessary for a person to be able have the necessity of a law in one’s will such that promises can be kept rather than undercut for momentary pleasure. A relationship in which one person’s sexual urge is not mastered but instead is allowed to be satisfied spontaneously whenever it is acutely felt is not really a relationship in any sense of the word. Unquestionably Nietzsche would regard such a person as weak rather than strong.



1. Friedrich Nietzsche, Genealogy of Morals, in Basic Writings of Nietzsche, Trans and Ed., Walter Kaufmann (New York: The Modern Library, 1968), p. 493.
2. Ibid, p. 494.
3. Ibid., p. 469, italics added.
4. Ibid., p. 481.
5. Ibid., p. 474.