All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

Never do anything when you are in a temper, for you will do everything wrong.

One who loses wealth loses much. One who loses a friend loses more. But one who loses courage loses all.

Simplicity is the ultimate sophistication.

Jealousy is the tribute mediocrity pays to genius.

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

The greatest power we have is the power of choice.

Love make us poets, and the approach of death should make us philosophers.

Obsession is the wellspring of genius and madness.

If you do what you've always done, you'll get what you've always gotten.

What's real and what's true aren't necessarily the same.

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

No matter how much suffering you went through, you never wanted to let go of those memories.

There is no question climate change is happening. The only arguable point is what part humans are playing in it.

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

It was a melancholy secret that reality can arouse desires but never satisfy them.

One who deceives will always find those who allow themselves to be deceived.

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

Wisdom... comes not from age, but from education and learning.

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

Those who see the invisible can do the impossible.