The darkness is at its deepest. Just before the sunrise.

We all look for happiness, but without knowing where to find it: like drunkards who look for their house, knowing dimly that they have one.

It requires ages to destroy a popular opinion.

Doctors put drugs of which they know little into bodies of which they know less for diseases of which they know nothing at all.

The more he became truly wise, the more he distrusted everything he knew.

Answer me, you who believe that animals are only machines. Has nature arranged for this animal to have all the machinery of feelings only in order for it not to have any at all?

To really enjoy pleasures, you must know how to leave them.