God and Satan alike are essentially human figures, the one a projection of ourselves, the other of our enemies.

Cynicism such as one finds very frequently among the most highly educated young men and women of the West, results from the combination of comfort and powerlessness.

Artists are on the average less happy than men of science.

Love as a relation between men and women was ruined by the desire to make sure of the legitimacy of children.

But as the work proceeded I was continually reminded of the fable about the elephant and the tortoise. Having constructed an elephant upon which the mathematical world could rest, I found the elephant tottering, and proceeded to construct a tortoise to keep the elephant from falling. But the tortoise was not more secure than the elephant, and after some twenty years of very arduous toil, I came to the conclusion that there was nothing more that I could do in the way of making mathematical knowledge indubitable.

Righteousness cannot be born until self-righteousness is dead.

The teaching of Christ, as it appears in the Gospels, has had extraordinarily little to do with the ethics of Christians.