The religion that is afraid of science dishonors God and commits suicide.

Man is not a farmer, or a professor, or an engineer, but he is all. Man is priest, and scholar, and statesman, and producer, and soldier.

For everything you gain, you lose something.

What's a book? Everything or nothing. The eye that sees it all.

All science is transcendental or else passes away.

Within, I do not find wrinkles and used heart, but unspent youth.

A sturdy lad from New Hampshire or Vermont who in turn tries all the professions, who teams it, farms it, peddles, keeps a school,preaches, edits a newspaper, goes to Congress, buys a township, and so forth, in successive years, and always like a cat falls on his feet, is worth a hundred of these city dolls. He walks abreast with his days and feels no shame in not "studying a profession," for he does not postpone his life, but lives already.