One that does not think to highly of himself is more than he thinks.

The sum which two married people owe to one another defies calculation. It is an infinite debt, which can only be discharged through all eternity.

The few of understanding, vision rare, Who veiled not from the herd their hearts, but tried, Poor generous fools, to lay their feelings bare, Them have men always burnt and crucified.

The world is so full of simpletons and madmen, that one need not seek them in a madhouse.

Beware of wishing for anything in youth, because you will get it in middle age.

Life is too short to drink bad wine.

Everything in science depends on what one calls an aperçu, on becoming aware of what is at the bottom of the phenomena. Such becoming aware is infinitely fertile.