We learn nothing from history except that we learn nothing from history.

Vivere est cogitare. (To think is to live)

The hours pass and the days and the months and the years, and the past time never returns.

Friendship is nothing else than entire fellow feeling as to all things human and divine with mutual good-will and affection; and I doubt whether anything better than this, wisdom alone excepted, has been given to man.

If only every man would make proper use of his strength and do his utmost, he need never regret his limited ability.

He has no worse enemy than himself.

I speak of that learning which wakes us acquainted with the boundless extent of nature, and the universe, and which even while we remain in this world, discovers to us both heaven, earth, and sea.