There is no justification for present existence other than its expansion into an indefinitely open future.

Regardless of the staggering dimensions of the world about us, the density of our ignorance, the risks of catastrophes to come, and our individual weakness within the immense collectivity, the fact remains that we are absolutely free today if we choose to will our existence in its finiteness, a finiteness which is open on the infinite. And in fact, any man who has known real loves, real revolts, real desires, and real will knows quite well that he has no need of any outside guarantee to be sure of his goals; their certitude comes from his own drive.

Science condemns itself to failure when, yielding to the infatuation of the serious, it aspires to attain being, to contain it, and to possess it; but it finds its truth if it considers itself as a free engagement of thought in the given, aiming, at each discovery, not at fusion with the thing, but at the possibility of new discoveries; what the mind then projects is the concrete accomplishment of its freedom.

There has to be a certain relationship between the life and the writing style, and that is really a problem.

There are so many problems. Women can go to work on these as well without giving up their feminism.

The time that one gains cannot be accumulated in a storehouse; it is contradictory to want to save up existence, which, the fact is, exists only by being spent and there is a good case for showing that airplanes, machines, the telephone, and the radio do not make men of today happier than those of former times.

A freedom which is interested only in denying freedom must be denied. And it is not true that the recognition of the freedom of others limits my own freedom: to be free is not to have the power to do anything you like; it is to be able to surpass the given toward an open future; the existence of others as a freedom defines my situation and is even the condition of my own freedom. I am oppressed if I am thrown into prison, but not if I am kept from throwing my neighbor into prison.