A day for toil, an hour for sport, but for a friend is life too short.

Two sorts of writers possess genius: those who think, and those who cause others to think.

Don't waste life in doubts and fears; spend yourself on the work before you, well assured that the right performance of this hour's duties will be the best preparation for the hours and ages that will follow it.

Why should you renounce your right to traverse the star-lit deserts of truth, of the premature comforts of an acre, house, and barn? Truth also has its roof, and bed, and board.

Every man is wanted, and no man is wanted much.

What is the hardest task in the world? To think.

Let a man learn to look for the permanent in the mutable and fleeting; let him learn to bear the disappearance of things he was wont to reverence; without losing his reverence; let him learn that he is here, not to work, but to be worked upon; and that, though abyss open under abyss, and opinion displace opinion, all are at last contained in the Eternal Cause.