No Christian can be a pessimist, for Christianity is a system of radical optimism.

Nobody is bored when he is trying to make something that is beautiful or to discover something that is true.

The world belongs to those who think and act with it, who keep a finger on its pulse.

Even the paradise of fools is not an unpleasant abode while it is inhabitable.

It is astonishing with how little wisdom mankind can be governed, when that little wisdom is its own.

In praising science, it does not follow that we must adopt the very poor philosophies which scientific men have constructed. In philosophy they have much more to learn than to teach.

The wisdom of the wise is an uncommon degree of common sense.