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

To be wronged is nothing unless you continue to remember it.

Criticize the act, not the person.

Intellectuals solve problems, geniuses prevent them.

The secret of life, though, is to fall seven times and to get up eight times.

The impossible could not have happened, therefore the impossible must be possible in spite of appearances.

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.

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

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

Thought can be so seductive and hypnotic that it absorbs your attention totally, so you become your thoughts.

Great acts are made up of small deeds.

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

Having a great intellect is no path to being happy.

Forget not that the earth delights to feel your bare feet and the winds long to play with your hair.

Accuracy is the twin brother of honesty; inaccuracy, of dishonesty.

The greatest power we have is the power of choice.

Throw your heart over the fence and the rest will follow.

The noblest pleasure is the joy of understanding.

Intelligence is a moral category.

Obsession is the wellspring of genius and madness.

In a good bookroom you feel in some mysterious way that you are absorbing the wisdom contained in all the books through your skin, without even opening them.