Emancipation from error is the condition of real knowledge.

The tragic solemnity of existence strikes us with terrible force on that morning when we wake to find the mournful words "too late" ringing in our ears.

Doing easily what others find difficult is talent; doing what is impossible for talent is genius.

Almost everything comes from almost nothing.

It gives liberty and breadth to thought, to learn to judge our own epoch from the point of view of universal history, history from the point of view of geological periods, geology from the point of view of astronomy.

The test of every religious, political, or educational system, is the man which it forms. If a system injures the intelligence it is bad. If it injures the character it is vicious. If it injures the conscience it is criminal.

True humility is contentment.