We are as great as our belief in human liberty - no greater. And our belief in human liberty is only ours when it is larger than ourselves.

The task of man is not to discover new worlds, but to discover his own world in terms of human comprehension and beauty.

The only thing about a man that is a man . . . is his mind. Everything else you can find in a pig or a horse.

See the world as it truly is, small and blue, beautiful in that eternal silence where it floats.

There is no dusk to be, There is no dawn that was, Only there's now, and now, And the wind in the grass.

We have no choice but to be guilty. God is unthinkable if we are innocent.

Freedom is the right to choose: the right to create for oneself the alternatives of choice. Without the possibility of choice and the exercise of choice a man is not a man but a member, an instrument, a thing.