The experience of overcoming fear is extraordinarily delightful.

The satisfaction to be derived from success in a great constructive enterprise is one of the most massive that life has to offer.

Indignation is a submission of our thoughts, but not of our desires.

The life of man is a long march through the night, surrounded by invisible foes, tortured by weariness and pain, towards a goal that few can hope to reach, and where none may tarry long.

Never try to discourage thinking, for you are sure to succeed.

I should like to believe my people's religion, which was just what I could wish, but alas, it is impossible. I have really no religion, for my God, being a spirit shown merely by reason to exist, his properties utterly unknown, is no help to my life. I have nor the parson's comfortable doctrine that every good action has its reward, and every sin is forgiven. My whole religion is this: do every duty, and expect no reward for it, either here or hereafter.

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