The only true wisdom is in knowing you know nothing.

One can have no smaller or greater mastery than mastery of oneself.

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

A leader is best when people barely know he exists, when his work is done, his aim fulfilled, they will say, we did it ourselves.

That which does not kill us makes us stronger.

Those who know do not speak, those who speak do not know.

If you tell the truth, you don't have to remember anything.

For a man to conquer himself is the first and noblest of all victories.

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