A vain man can never be utterly ruthless: he wants to win applause and therefore he accommodates himself to others

It matters little whether a man be mathematically or philologically or artistically cultivated, so he be but cultivated.

When you are in conflict with someone, there is one factor that can make the difference between damaging your relationship and deepening it. That factor is attitude. We don't get to know people when they come to us; we must go to them to find out what they are like.

For usually people resist as long as they can to dismiss the fool they harbor in their bosom, they resist to confess a major mistake or to admit a truth that makes them despair.

Everything factual is, in a sense, theory. The blue of the sky exhibits the basic laws of chromatics. There is no sense in looking for something behind phenomena: they are theory.

There is no crime of which I do not deem myself capable.

To make a young couple love each other, it is only necessary to oppose and separate them.