Good-humor is a philosophic state of mind; it seems to say to Nature that we take her no more seriously than she takes us. I maintain that one should always talk of philosophy with a smile. We owe it to the Eternal to be virtuous; but we have the right to add to this tribute our irony as a sort of personal reprisal. In this way we return to the right quarter jest for jest; we play the trick that has been played on us.

Feuilles Detachees by Ernest Renan