Man is nothing else but what he makes of himself. Such is the first principle of existentialism.
existentialism And Human Emotionsby jean-paul Sartre
I can always choose, but I ought to know that if I do not choose, I am still choosing.
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.
And every man ought to say to himself, “Am I really the kind of man who has the right to act in such a way that humanity might guide itself by my actions?”