A pessimist is a well-informed optimist.

A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.

I'm a pessimist. But I'm a pessimist with a sense of responsibility.

A true man hates no one.

Let me declare expressly that in the days when mankind was not yet ashamed of its cruelty, life on earth was more cheerful than it is now that pessimists exist.

Remember that a man, a true man, never hates. His rages and his bad moods never last beyond the present moment-like electric shocks.