That which determines a man, that which makes him one man, one and not another, the man he is and not the man he is not, is a principle of unity and a principle of continuity. A principle of unity firstly in space, thanks to the body, and next in action and intention. When we walk, one foot does not go forward and the other backward, nor, when we look, if we are normal, does one eye look towards the north and the other towards the south. In each moment of our life we entertain some purpose, and to this purpose the synergy of our actions is directed. Notwithstanding the next moment we may change our purpose. And in a certain sense a man is so much the more a man the more unitary his action. Some there are who throughout their whole life follow but one single purpose, be it what it may.

Also a principle of continuity in time. Without entering upon a discussion—an unprofitable discussion—as to whether I am or am not he who I was twenty years ago, it appears to me to be indisputable that he who I am to-day derives, by a continuous series of states of consciousness, from him who was in my body twenty years ago. Memory is the basis of individual personality, just as tradition is the basis of the collective personality of a people. We live in memory and by memory, and our spiritual life is at bottom simply the effort of our memory to persist, to transform itself into hope, the effort of our past to transform itself into our future.

All this, I know well, is sheer platitude; but in going about in the world one meets men who seem to have no feeling of their own personality. One of my best friends with whom I have walked and talked every day for many years, whenever I spoke to him of this sense of one's own personality, used to say: "But I have no sense of myself; I don't know what that is."

On a certain occasion this friend remarked to me: "I should like to be So-and-so" (naming someone), and I said: "That is what I shall never be able to understand—that one should want to be someone else. (To want to be someone else is to want to cease to be he who one is.) I understand that one should wish to have what someone else has, his wealth or his knowledge; but to be someone else, that is a thing I cannot comprehend." It has often been said that every man who has suffered misfortunes prefers to be himself, even with his misfortunes, rather than to be someone else without them. For unfortunate men, when they preserve their normality in their misfortune—that is to say, when they endeavour to persist in their own being—prefer misfortune to non-existence. For myself I can say that as a youth, and even as a child, I remained unmoved when shown the most moving pictures of hell, for even then nothing appeared to me quite so horrible as nothingness itself. It was a furious hunger of being that possessed me, an appetite for divinity, as one of our ascetics has put it.[7]

To propose to a man that he should be someone else, that he should become someone else, is to propose to him that he should cease to be himself. Everyone defends his own personality, and only consents to a change in his mode of thinking or of feeling in so far as this change is able to enter into the unity of his spirit and become involved in its continuity; in so far as this change can harmonize and integrate itself with all the rest of his mode of being, thinking and feeling, and can at the same time knit itself with his memories. Neither of a man nor of a people—which is, in a certain sense, also a man—can a change be demanded which breaks the unity and continuity of the person. A man can change greatly, almost completely even, but the change must take place within his continuity.

It is true that in certain individuals there occur what are called changes of personality; but these are pathological cases, and as such are studied by alienists. In these changes of personality, memory, the basis of consciousness, is completely destroyed, and all that is left to the sufferer as the substratum of his individual continuity, which has now ceased to be personal, is the physical organism. For the subject who suffers it, such an infirmity is equivalent to death—it is not equivalent to death only for those who expect to inherit his fortune, if he possesses one! And this infirmity is nothing less than a revolution, a veritable revolution.

A disease is, in a certain sense, an organic dissociation; it is a rebellion of some element or organ of the living body which breaks the vital synergy and seeks an end distinct from that which the other elements co-ordinated with it seek. Its end, considered in itself—that is to say, in the abstract—may be more elevated, more noble, more anything you like; but it is different. To fly and breathe in the air may be better than to swim and breathe in the water; but if the fins of a fish aimed at converting themselves into wings, the fish, as a fish, would perish. And it is useless to say that it would end by becoming a bird, if in this becoming there was not a process of continuity. I do not precisely know, but perhaps it may be possible for a fish to engender a bird, or another fish more akin to a bird than itself; but a fish, this fish, cannot itself and during its own lifetime become a bird.

Everything in me that conspires to break the unity and continuity of my life conspires to destroy me and consequently to destroy itself. Every individual in a people who conspires to break the spiritual unity and continuity of that people tends to destroy it and to destroy himself as a part of that people. What if some other people is better than our own? Very possibly, although perhaps we do not clearly understand what is meant by better or worse. Richer? Granted. More cultured? Granted likewise. Happier? Well, happiness ... but still, let it pass! A conquering people (or what is called conquering) while we are conquered? Well and good. All this is good—but it is something different. And that is enough. Because for me the becoming other than I am, the breaking of the unity and continuity of my life, is to cease to be he who I am—that is to say, it is simply to cease to be. And that—no! Anything rather than that!

Another, you say, might play the part that I play as well or better? Another might fulfil my function in society? Yes, but it would not be I.

"I, I, I, always I!" some reader will exclaim; "and who are you?" I might reply in the words of Obermann, that tremendous man Obermann: "For the universe, nothing—for myself, everything"; but no, I would rather remind him of a doctrine of the man Kant—to wit, that we ought to think of our fellow-men not as means but as ends. For the question does not touch me alone, it touches you also, grumbling reader, it touches each and all. Singular judgments have the value of universal judgments, the logicians say. The singular is not particular, it is universal.