No matter how full a reservoir of maxims one may possess, and no matter how good one's sentiments may be, if one has not taken advantage of every concrete opportunity to act, one's character may remain entirely unaffected for the better.

A great many people think they are thinking when they are merely rearranging their prejudices.

The great use of life is to spend it for something that will outlast it.

Great emergencies and crises show us how much greater our vital resources are than we had supposed.

The history of philosophy is to a great extent that of a certain clash of human temperaments.