All passions exaggerate; and they are passions only because they do exaggerate.
Do not suppose opportunity will knock twice at your door.
What one knows best is ... what one has learned not from books but as a result of books, through the reflections to which they have given rise.
Life is a malady in which sleep soothes us every sixteen hours; it is a palliation; death is the remedy.
Real worth requires no interpreter: its everyday deeds form its emblem.
Knowledge is boundless,--human capacity, limited.