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.

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.

Existentialism
“every appearance in nature corresponds to some state of the mind,” we have entered the familiar Wordsworthian Romantic territory in which nature is phenomena and spirit is noumena and the task of the human person is to draw his being from whatever inscrutable force produces, organizes, and infuses the phenomenal universe — an “ineffable essence which we call Spirit. Being as not being stable but forever in flux and transition. Even history, Which seems obviously about the past, has its true use as the servant of the present.' Emerson and Buddhism stand for spirituality purged of creed detritus.' the essence of Existentialism is that you find meaning in nature, wisdom, mind and body.

Existentialism is a 'movement' which like all such movements has a flabby periphery and a hard center. That center is the thought of Heidegger.

Atheistic existentialism, of which I am a representative, declares with greater consistency that if God does not exist there is at least one being whose existence comes before its essence, a being which exists before it can be defined by any conception of it. That being is man....

Existentialism rests on phenomenology, i.e., it uses personal, subjective experience as the foundation upon which abstract knowledge is built.

Existentialism means that no one else can take a bath for you.

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 the kind of philosophy that makes for legendary children.

L'existentialiste, au contraire, pense qu'il est très gênant que Dieu n'existe pas, car avec lui disparaît toute possibilité de trouver des valeurs dans un ciel intelligible; il ne peut plus y avoir de bien a priori, puisqu'il n'y a pas de conscience infinie et parfaite pour le penser; il n'est écrit nulle part que le bien existe, qu'il faut être honnête, qu'il ne faut pas mentir, puisque précisément nous sommes sur un plan où il y a seulement des hommes.

The existentialist, on the contrary, finds it extremely embarrassing that God does not exist, for there disappears with Him all possibility of finding values in an intelligible heaven. There can no longer be any good a priori, since there is no infinite and perfect consciousness to think it. It is nowhere written that “the good” exists, that one must be honest or must not lie, since we are now upon the plane where there are only men. Dostoevsky once wrote: “If God did not exist, everything would be permitted”; and that, for existentialism, is the starting point. Everything is indeed permitted if God does not exist, and man is in consequence forlorn, for he cannot find anything to depend upon either within or outside himself. He discovers forthwith, that he is without excuse.

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

Nietzsche was not an Existentialist. Existentialism emerged out of the conflict between Nietzsche and Kierkegaard, the Danish religious writer.

Existentialism's first move is to make every man aware of what he is and to make the full responsibility of his existence rest on him.