I found the human heart empty and insipid everywhere except in books. - Jean-Paul Sartre

If existence really does precede essence, there is no explaining things away by reference to a fixed and given human nature. In other words, there is no determinism, man is free, man is freedom. On the other hand, if God does not exist, we find no values or commands to turn to which legitimize our conduct. So, in the bright realm of values, we have no excuse behind us, nor justification before us. We are alone, with no excuses.

Revoluţionarul este individul care doreşte să schimbe lumea şi o depăşeşte în sensul viitorului către o ordine a valorilor pe care o inventează.

They explain the new by the old — and the old they explain by the older still, like those
historians who turn a Lenin into a Russian Robespierre, and a Robespierre into a French Cromwell: when all is said and done, they have never understood anything at all.