The study of mathematics is apt to commence in disappointment... We are told that by its aid the stars are weighed and the billions of molecules in a drop of water are counted. Yet, like the ghost of Hamlet's father, this great science eludes the efforts of our mental weapons to grasp it.

The art of progress is to preserve order amid change and to preserve change amid order.

The vigor of civilized societies is preserved by the widespread sense that high aims are worth-while.

The defense of morals is the battle-cry which best rallies stupidity against change.

A philosopher of imposing stature doesn't think in a vacuum. Even his most abstract ideas are, to some extent, conditioned by what is or is not known in the time when he lives.

No reason can be given for the nature of God, because that nature is the ground of rationality.

Each generation criticizes the unconscious assumptions made by its parent. It may assent to them, but it brings them out in the open.