By his machines man can dive and remain under water like a shark; can fly like a hawk in the air; can see atoms like a gnat; can see the system of the universe of Uriel, the angel of the sun; can carry whatever loads a ton of coal can lift; can knock down cities with his fist of gunpowder; can recover the history of his race by the medals which the deluge, and every creature, civil or savage or brute, has involuntarily dropped of its existence; and divine the future possibility of the planet and its inhabitants by his perception of laws of nature.

The virtues of society are vices of the saint. The terror of reform is the discovery that we must cast away our virtues, or what we have always esteemed such, into the same pit that has consumed our grosser vices.

The evolution of a highly destined society must be moral; it must run in the grooves of the celestial wheels.

There is creative reading as well as creative writing.

The things we now esteem fixed shall, one by one, detach themselves, like ripe fruit, from our experience, and fall. The wind shall blow them none knows whither.

Sleep takes off the costume of circumstance, arms us with terrible freedom, so that every will rushes to deed. A skillful man reads his dreams for his self-knowledge; yet not the details, but the quality. What part does he play in them - a cheerful, manly part, or a poor, drivelling part? However monstrous and grotesque their apparitions, they have a substantial truth.

Good as is discourse, silence is better and shames it.