The most certain sign of wisdom is cheerfulness.

Knowing is not enough, we must apply. Willing is not enough, we must do.

Happiness is not an ideal of reason, but of imagination.

It is not enough to have a good mind; the main thing is to use it well.

Stupidity is a talent for misconception.

Taste every fruit of every tree in the garden at least once. It is an insult to creation not to experience it fully. Temperance is wickedness.

To a wise and good man the whole earth is his fatherland.

If a man could have half of his wishes, he would double his troubles.

Wisdom begins at the end.

Science is organized knowledge. Wisdom is organized life.

Work is the price which is paid for reputation.

Anywhere you go in the world is what you make of it, not what you read in books.

Rational discussion is useful only when there is a significant base of shared assumptions.

He alone is free who lives with free consent under the entire guidance of reason.

It is not the strength, but the duration, of great sentiments that makes great men.

Let him who would move the world first move himself.

I believe that one defines oneself by reinvention. To not be like your parents. To not be like your friends. To be yourself. To cut yourself out of stone.

Nobody made a greater mistake than he who did nothing because he could do only a little.

When you learn, teach, when you get, give.

We sometimes congratulate ourselves at the moment of waking from a troubled dream; it may be so the moment after death.

He who conquers others is strong; he who conquers himself is mighty.