What do we mean by saying that existence precedes essence? We mean that man first of all exists, encounters himself, surges up in the world—and defines himself afterwards. If man as the existentialist see him is not definable, it is because to begin with he is nothing. He will not be anything until later, and then he will be what he makes of himself. Thus, there is no human nature, because there is no God to have a conception of it. Man simply is. Not that he is simply what he conceives himself to be, but he is what he wills, and as he conceives himself after already existing – as he wills to be after that leap towards existence. Man is nothing else but that which he makes of himself. That is the first principle of existentialism.

The existential way of understanding human beings has some illustrious progenitors in Western history, such as Socrates in his dialogues, Augustine in his depth-psychological analyses of the self, Pascal in his struggle to find a place for the “heart’s reasons which the reason knows not of.” But it arose specifically just over a hundred years ago in Kierkegaard’s violent protest against the reigning rationalism of his day Hegel’s “totalitarianism of reason,” to use Maritain’s phrase. Kierkegaard proclaimed that Hegel’s identification of abstract truth with reality was an illusion and amounted to trickery. “Truth exists,” wrote Kierkegaard, “only as the individual himself produces it in action.”

Now at the end, we come back to the beginning: to the situation of the world here and now, from which all understanding must start and to which it must return. In all existential thinking it is we ourselves, the questioners, who are ultimately in question.

Dostoevsky said, “If God didn’t exist, everything would be possible.” That is the very starting point of existentialism. Indeed, everything is permissible if God does not exist, and as a result man is forlorn, because neither within him nor without does he find anything to cling to. He can’t start making excuses for himself

The first existentialist was not Sartre, though he coined the term. Nor was it Kierkegaard or Nietzsche, though most of the textbooks say so. Nor was it even Pascal, though he foreshadowed half of Kierkegaard and was the first to write about the fundamental existential experience of cosmic anxiety and meaninglessness. It was not even Saint Augustine, whose Confessions stands out as the profoundest example of depth psychology and existential autobiography ever written. It was not even Socrates, who alone among philosophers totally existed his philosophy.
Rather, the first existentialist was Solomon, or whoever wrote Ecclesiastes.

Life is more than thought: what a man feels, and what his senses awaken in him, are more indispensable to his life’s fullness than subsequent reflection on their significance. Both Stirner and Nietzsche have elaborated Faust’s opening speech in which he bemoans his wasted years in academia: this speech is Goethe’s own impeachment of Kant and Hegel. Philosophy proceeds always under the risk of making a fetish of thinking.

What an existential approach is about is positing that our bad feelings, our dysphoria, our despair, our anxiety emanates not only from our own life history and all the traumas we may have had in the past, and not only from the figures that we have introjected — many of these figures being unloving, or uncaring, or neurotic on their own parts — and emanates not only from our current life crises, but it emanates also, also, from our confrontation with the existential facts of life, with our confrontation with the human condition.

What is meant here by saying that existence precedes essence? It means first of all, man exists, turns up, appears on the scene, and, only afterwards, defines himself. If man, as the existentialist conceives him, is indefinable, it is because at first he is nothing. Only afterward will he be something, and he himself will have made what he will be.

Existentialism is no mournful delectation but a humanist philosophy of action, effort, combat, and solidarity. Man must create his own essence: it is in throwing himself into the world, suffering there, struggling there, that he gradually defines say what this man is before he dies, or what mankind is before it has disappeared.

Man is nothing else but what he makes of himself. Such is the first principle of existentialism.

On the one hand, the existentialist seeks to remain true to his original vision of the meaninglessness and futility of everything, since this fundamental cosmic honesty must be the basis of any attempt to live authentically; on the other hand, his stark personal reality is that he finds himself unable to appropriate the truth of nihilism existentially, unable to affirm it as his personal truth, the truth within which he will henceforth live: and it is at this point that he clutches at the artifice of commitment, hoping to save himself from nihilistic despair by a desperate leap towards a faith that will restore purpose and meaning to his shattered world.

What is meant by the term existentialism? Most people who use the word would be rather embarrassed if they had to explain it, since, now that the word is all the rage, even the work of a musician or painter is being called existentialist. A gossip columnist in Clartés signs himself The Existentialist, so that by this time the word has been so stretched and has taken on so broad a meaning, that it no longer means anything at all.

Existentialism is nothing else but an attempt to draw the full conclusions from a consistently atheistic position. Its intention is not in the least that of plunging men into despair. And if by despair one means as the Christians do – any attitude of unbelief, the despair of the existentialists is something different. Existentialism is not atheist in the sense that it would exhaust itself in demonstrations of the non-existence of God. It declares, rather, that even if God existed that would make no difference from its point of view. Not that we believe God does exist, but we think that the real problem is not that of His existence; what man needs is to find himself again and to understand that nothing can save him from himself, not even a valid proof of the existence of God. In this sense existentialism is optimistic. It is a doctrine of action, and it is only by self-deception, by confining their own despair with ours that Christians can describe us as without hope.

The existential attitude is one of involvement in contrast to a merely theoretical or detached attitude. “Existential” in this sense can be defined as participating in a situation, especially a cognitive situation, with the whole of one’s existence.