Everything excellent is as difficult as it is rare.

Learning and wisdom are superfluities, the surface glitter merely, but it is the heart that is the seat of all power.

Circumstances do not make a man, they reveal him.

Only from the heart can you touch the sky.

Adapt what is useful, reject what is useless, and add what is specifically your own.

I think, therefore I am.

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

Out of suffering have emerged the strongest souls; the most massive characters are seared with scars.

It takes a great man to be a good listener.

What lies behind us and what lies ahead of us are tiny matters compared to what lives within us.

If you're happy, don't worry you'll get over it.

The best revenge is to be unlike him who performed the injury.

Good advice is always certain to be ignored, but that's no reason not to give it.

The one you buy will be the only one that doesn't work.

We never see ourselves as others see us.

Achievement brings its own anticlimax.

The wise man should restrain his senses like the crane and accomplish his purpose with due knowledge of his place, time and ability.

Experience is the only prophecy of wise men.

Whatever it is you're seeking won't come in the form you're expecting.

Blessed are they who hunger and thirst for righteousness for they shall be satisfied.

Almost every wise saying has an opposite one, no less wise, to balance it.