From "Existentialism is a Humanism"  Jean Paul Sartre 1946

Quietism is the attitude of people who say, “let others do what I cannot do.” The doctrine I am presenting before you is precisely the opposite of this, since it declares that there is no reality except in action. It goes further, indeed, and adds, “Man is nothing else but what he purposes, he exists only in so far as he realises himself, he is therefore nothing else but the sum of his actions, nothing else but what his life is.” Hence we can well understand why some people are horrified by our teaching. For many have but one resource to sustain them in their misery, and that is to think, “Circumstances have been against me, I was worthy to be something much better than I have been. I admit I have never had a great love or a great friendship; but that is because I never met a man or a woman who were worthy of it; if I have not written any very good books, it is because I had not the leisure to do so; or, if I have had no children to whom X could devote myself it is because I did not find the man I could have lived with. So there remains within me a wide range of abilities, inclinations and potentialities, unused but perfectly viable, which endow me with a worthiness that could never be inferred from the mere history of my actions.” But in reality and for the existentialist, there is no love apart from the deeds of love; no potentiality of love other than that which is manifested in loving; there is no genius other than that which is expressed in works of art. The genius of Proust is the totality of the works of Proust; the genius of Racine is the series of his tragedies, outside of which there is nothing. Why should we attribute to Racine the capacity to write yet another tragedy when that is precisely what he — did not write? In life, a man commits himself, draws his own portrait and there is nothing but that portrait. No doubt this thought may seem comfortless to one who has not made a success of his life. On the other hand, it puts everyone in a position to understand that reality alone is reliable; that dreams, expectations and hopes serve to define a man only as deceptive dreams abortive hopes, expectations unfulfilled; that is to say, they define him negatively, not positively. Nevertheless, when one says, “You are nothing else but what you live,” it does not imply that an artist is to be judged solely by his works of art, for a thousand other things contribute no less to his definition as a man. What we mean to say is that a man is no other than a series of undertakings, that he is the sum, the organisation, the set of relations that constitute these undertakings.

In the light of all this, what people reproach w with is not, after all, our pessimism, but the sternness of our optimism. If people condemn our works of fiction, in which we describe characters that are base, weak, cowardly and sometimes even frankly evil, it is not only because those characters are base, weak, cowardly or evil. For suppose that, like Zola, we showed that the behaviour of these characters was caused by their heredity, or by the action of their environment upon them, or by determining factors, psychic or organic. People would be reassured, they would say, “You see, that is what we are like, no one can do anything about it.” But the existentialist, when he portrays a coward, shows him as responsible for his cowardice. He is not like that on account of a cowardly heart or lungs or cerebrum, he has not become like that through his physiological organism; he is like that because he has made himself into a cowardly actions. There is no such thing as a cowardly temperament. There are nervous temperaments; there is what is called impoverished blood, and there are also rich temperaments. But the man whose blood is poor is not a coward for all that, for what produces cowardice is the act of giving up or giving way; and a temperament is not an action. A coward is defined by the deed that he has done. What people feel obscurely, and with horror, is that the coward as we present him is guilty of being a coward. What people would prefer would be to be born either a coward or a hero. One of the charges most often laid against the Chemins de la Liberte. is something like this “But, after all, these people being so base, how can you make them into heroes?” That objection is really rather comic, for it implies that people are born heroes: and that is, at bottom, what such people would like to think. If you are born cowards, you can be quite content. you can do nothing about it and you will be cowards all your lives whatever you do; and if you are born heroes you can again be quite content; you will be heroes all your lives eating and drinking heroically. Whereas the existentialist says that the coward makes himself cowardly, the hero makes himself heroic; and that there is always a possibility for the coward to give up cowardice and for the hero to stop being a hero. What counts is the total commitment, and it is not by a particular case or particular action that you are committed altogether.

Man makes himself; he is not found ready-made; he makes himself by the choice of his morality, and he cannot but choose a morality, such is the pressure of circumstances upon him.

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[Then] they tax us with anarchy; then they say, “You cannot judge others, for there is no reason for preferring one purpose to another”; finally, they may say, “Everything being merely voluntary in this choice of yours, you give away with one hand what you pretend to gain with the other.” These three are not very serious objections. As to the first, to say that it does not matter what you choose is not correct. In one sense choice is possible, but what is not possible is not to choose. I can always choose, but I must know that if I do not choose, that is still a choice. This, although it may appear merely formal, is of great importance as a limit to fantasy and caprice. For, when I confront a real situation – for example, that I am a sexual being, able to have relations with a being of the other sex and able to have children – I am obliged to choose my attitude to it, and in every respect I bear the responsibility of the choice which, in committing myself, also commits the whole of humanity. Even if my choice is determined by no a priori value whatever, it can have nothing to do with caprice... man finds himself in an organized situation in which he is himself involved: his choice involves mankind in its entirety [see Kant: Categorical Imperative], and he cannot avoid choosing. Either he must remain single, or he must marry without having children, or he must marry and have children. In any case, and whichever he may choose, it is impossible for him, in respect of this situation, not to take complete responsibility. Doubtless he chooses without reference to any pre-established value, but it is unjust to tax him with caprice. Rather let us say that the moral choice is comparable to the construction of a work of art.

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We can judge, nevertheless, for, as I have said, one chooses in view of others, and in view of others one chooses himself. One can judge, first – and perhaps this is not a judgment of value, but it is a logical judgment – that in certain cases choice is founded upon an error, and in others upon the truth. One can judge a man by saying that he deceives himself. Since we have defined the situation of man as one of free choice, without excuse and without help, any man who takes refuge behind the excuse of his passions, or by inventing some deterministic doctrine, is a self-deceiver. One may object: “But why should he not choose to deceive himself?” I reply that it is not for me to judge him morally, but I define his self-deception as an error. Here one cannot avoid pronouncing a judgment of truth. The self-deception is evidently a falsehood, because it is a dissimulation of man’s complete liberty of commitment. Upon this same level, I say that it is also a self-deception if I choose to declare that certain values are incumbent upon me; I am in contradiction with myself if I will these values and at the same time say that they impose themselves upon me. If anyone says to me, “And what if I wish to deceive myself?” I answer, “There is no reason why you should not, but I declare that you are doing so, and that the attitude of strict consistency alone is that of good faith.” Furthermore, I can pronounce a moral judgment. For I declare that freedom, in respect of concrete circumstances, can have no other end and aim but itself; and when once a man has seen that values depend upon himself, in that state of forsakenness he can will only one thing, and that is freedom as the foundation of all values. That does not mean that he wills it in the abstract: it simply means that the actions of men of good faith have, as their ultimate significance, the quest of freedom itself as such. A man who belongs to some communist or revolutionary society wills certain concrete ends, which imply the will to freedom, but that freedom is willed in community. We will freedom for freedom’s sake, in and through particular circumstances. And in thus willing freedom, we discover that it depends entirely upon the freedom of others and that the freedom of others depends upon our own. Obviously, freedom as the definition of a man does not depend upon others, but as soon as there is a commitment, I am obliged to will the liberty of others at the same time as my own. I cannot make liberty my aim unless I make that of others equally my aim. Consequently, when I recognise, as entirely authentic, that man is a being whose existence precedes his essence, and that he is a free being who cannot, in any circumstances, but will his freedom, at the same time I realize that I cannot not will the freedom of others. Thus, in the name of that will to freedom which is implied in freedom itself, I can form judgments upon those who seek to hide from themselves the wholly voluntary nature of their existence and its complete freedom. Those who hide from this total freedom, in a guise of solemnity or with deterministic excuses, I shall call cowards. Others, who try to show that their existence is necessary, when it is merely an accident of the appearance of the human race on earth – I shall call scum. But neither cowards nor scum can be identified except upon the plane of strict authenticity. Thus, although the content of morality is variable, a certain form of this morality is universal. Kant declared that freedom is a will both to itself and to the freedom of others. Agreed: but he thinks that the formal and the universal suffice for the constitution of a morality. We think, on the contrary, that principles that are too abstract break down when we come to defining action. To take once again the case of that student; by what authority, in the name of what golden rule of morality, do you think he could have decided, in perfect peace of mind, either to abandon his mother or to remain with her? There are no means of judging. The content is always concrete, and therefore unpredictable; it has always to be invented. The one thing that counts, is to know whether the invention is made in the name of freedom.

"Existentialism is a Humanism"

Good analysis of essay: http://www.uri.edu/personal/szunjic/philos/human.htm