Be curious, not judgmental.

We thought that we had the answers, it was the questions we had wrong.

Moderation in temper is always a virtue; but moderation in principle is always a vice.

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

What a liberation to realize that the “voice in my head” is not who I am. Who am I then? The one who sees that.

Desire is the very essence of man.

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

I am a lover of truth, a worshipper of freedom, a celebrant at the altar of language and purity and tolerance.

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

Science is organized knowledge. Wisdom is organized life.

Property is surely a right of mankind as real as liberty.

Your reputation is in the hands of others. That's what the reputation is. You can't control that. The only thing you can control is your character.

What you're thinking is what you're becoming.

The absent are never without fault, nor the present without excuse.

A man who as a physical being is always turned toward the outside, thinking that his happiness lies outside him, finally turns inward and discovers that the source is within him.

It takes a great man to be a good listener.

If we know exactly where we're going, exactly how to get there, and exactly what we'll see along the way, we won't learn anything.

Only idiots refuse to change their minds.

There are no eternal facts, as there are no absolute truths.

The noblest pleasure is the joy of understanding.

Where there is anger, there is always pain underneath.