Knowing makes all the difference... It's the difference between just trying to keep alive, and having something to live for

The simple rely on a bolstering mass of maxim and precept, so do the timid, so do the mentally lazy – and so do all of us, more than we imagine.

The essential quality of life is living' the essential quality of living is change; change is evolution; and we are part of it.

If you run away from a thing just because you don't like it, you don't like what you find either.

The humans have a curious force they call ambition. It drives them, and, through them, it drives us. This force which keeps them active, we lack. Perhaps, in time, we machines will acquire it.

There is an inability to sustain the tragic mood, a phoenix quality of the mind. It may be helpful or harmful, it is just a part of the will to survive—yet, also, it has made it possible for us to engage in one weakening war after another. But it is a necessary part of our mechanism that we should be able to cry only for a time over even an ocean of spilt milk—the spectacular must soon become the commonplace if life is to be supportable.

We all have our youthful follies, embarassing to recall -- but people somehow find it hard to dismiss as a youthful folly anything that has happened to be a financial success.