We must learn to reawaken and keep ourselves awake, not by mechanical aid, but by an infinite expectation of the dawn.

We are double-edged blades, and every time we whet our virtue the return stroke strops our vice.

When a shadow flits across the landscape of the soul where is the substance?

Indeed, the best books have a use, like sticks and stones, which is above or beside their design, not anticipated in the preface,not concluded in the appendix. Even Virgil's poetry serves a very different use to me today from what it did to his contemporaries. It has often an acquired and accidental value merely, proving that man is still man in the world.

Observation is so wide awake, and facts are being so rapidly added to the sum of human experience, that it appears as if the theorizer would always be in arrears, and were doomed forever to arrive at imperfect conclusion; but the power to perceive a law is equally rare in all ages of the world, and depends but little on the number of facts observed.

Nature is as well adapted to our weakness as to our strength.

The Jesuits were quite balked by those Indians who, being burned at the stake, suggested new modes of tortures to their tormentors. Being superior to physical suffering, it sometimes chanced that they were superior to any consolation which the missionaries could offer; and the law to do as you would be done by fell with less persuasiveness on the ears of those who, for their part, did not care how they were done by, who loved their enemies after a new fashion, and came very near freely forgiving them all they did.