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

The only way to get the best of an argument is to avoid it.

Everybody is ignorant, only on different subjects.

Intelligence is the ability to adapt to change.

A mistake is always forgivable, rarely excusable and always unacceptable.

To do great things is difficult, but to command great things is more difficult.

I hear and I forget. I see and I remember. I do and I understand.

Yesterday I was clever, so I wanted to change the world. Today I am wise, so I am changing myself.

I've never known any trouble than an hour's reading didn't assuage.

Do not pray for an easy life, pray for the strength to endure a difficult one.

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

No one can make you feel inferior without your consent.

Circumstances do not make a man, they reveal him.

When you judge another, you do not define them, you define yourself.

I've come to believe that all my past failure and frustration were actually laying the foundation for the understandings that have created the new level of living I now enjoy.

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

Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.

To me, being an intellectual doesn't mean knowing about intellectual issues; it means taking pleasure in them.

If you don't like someone's story, write your own.

Great dreams of great dreamers are always transcended.

Don't criticize what you don't understand, son. You never walked in that man's shoes.