A man should carry nature in his head.

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.

Finish each day and be done with it. You have done what you could. Some blunders and absurdities no doubt crept in; forget them as soon as you can. Tomorrow is a new day; begin it well and serenely and with too high a spirit to be encumbered with your old nonsense.

The trail of the serpent reaches into all the lucrative professions and practices of man. Each has its own wrongs. Each finds a tender and very intelligent conscience a disqualification for success. Each requires of the practitioner a certain shutting of the eyes, a certain dapperness and compliance, an acceptance of customs, a sequestration from the sentiments of generosity and love, a compromise of private opinion and lofty integrity.

No member of a crew is praised for the rugged individuality of his rowing.

I honor health as the first muse, and sleep as the condition of health. Sleep benefits mainly by the sound health it produces; incidentally also by dreams, into whose farrago a divine lesson is sometimes slipped.

The pulpit and the press have many commonplaces denouncing the thirst for wealth, but if men should take these moralists at their word, and leave off aiming to be rich, the moralists would rush to rekindle at all hazards this love of power in the people, lest civilization should be undone.