One always begins with the simple, then comes the complex, and by superior enlightenment one often reverts in the end to the simple. Such is the course of human intelligence.

The famous physician Dumoulin said when dying, 'I leave two great physicians behind me, simple food and pure water.'

Men will always be mad, and those who think they can cure them are the maddest of all.

There is no such thing as an accident. What we call by that name is the effect of some cause which we do not see.

Doubt is not a pleasant condition, but certainty is absurd.

Clever tyrants are never punished.

Everything's fine today, that is our illusion.