Heidegger's philosophy is neither atheism nor theism, but a description of the world from which God is absent. - William Barrett

Plato began his philosophic career as the result of a conversion. This is surely an existential beginning.

The essential freedom, the ultimate and final freedom that cannot be taken from a man, is to say No. This is the basic premise in Sartre's view of human freedom: freedom is in its very essence negative, though the negativity is also creative.

The bomb reveals the dreadful and total contingency of human existence. Existentialism is the philosophy of the atomic age.