Religion has done love a great service by making it a sin.

Of all the ways of defining man, the worst is the one which makes him out to be a rational animal.

Distrust even Mathematics; albeit so sublime and highly perfected, we have here a machine of such delicacy it can only work in vacuo, and one grain of sand in the wheels is enough to put everything out of gear. One shudders to think to what disaster such a grain of sand may bring a Mathematical brain. Remember Pascal.

Silence is the wit of fools.

People who have no weaknesses are terrible; there is no way of taking advantage of them.

The power of love itself weakens and gradually becomes lost with age, like all the other energies of man.

The Arab who built himself a hut with marbles from the temple of Palmyra is more philosophical than all the curators of the museums of London, Paris, and Munich.