The only true wisdom is in knowing you know nothing.

The more I see, the less I know for sure.

Conquering others takes force, conquering yourself is true strength.

It's not what you are that holds you back, it's what you think you are not.

There's no one thing that's true. It's all true.

Courage is resistance to fear, mastery of fear, not absence of fear.

I have never let my schooling interfere with my education.

The fear of death follows from the fear of life. A man who lives fully is prepared to die at any time.

We may have all come on different ships, but we’re in the same boat now.