He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.

Respect yourself if you would have others respect you.

Nothing fixes a thing so intensely in the memory as the wish to forget it.

A good teacher protects his pupils from his own influence.

Obsession is the wellspring of genius and madness.

How often I found where I should be going only by setting out for somewhere else.

Men are not prisoners of fate, but only prisoners of their own minds.

Intellectuals solve problems, geniuses prevent them.

Where there is anger, there is always pain underneath.

We seldom realize, for example that our most private thoughts and emotions are not actually our own. For we think in terms of languages and images which we did not invent, but which were given to us by our society.

Unfortunately, the clock is ticking, the hours are going by. The past increases, the future recedes. Possibilities decreasing, regrets mounting.

Each day is a little life; every waking and rising a little birth; every fresh morning a little youth; every going to rest and sleep a little death.

If we don't believe in freedom of expression for people we despise, we don't believe in it at all.

Only idiots refuse to change their minds.

Boredom is the root of all evil - the despairing refusal to be oneself.

Wise men speak because they have something to say; Fools because they have to say something.

The cure for pain is in the pain.

The pendulum of the mind oscillates between sense and nonsense, not between right and wrong.

Tact is the knack of making a point without making an enemy.

What a man does for others, not what they do for him, gives him immortality.

What can't be cured must be endured.