There is nothing more dreadful than the habit of doubt. Doubt separates people. It is a poison that disintegrates friendships and breaks up pleasant relations. It is a thorn that irritates and hurts; it is a sword that kill.

The one exclusive sign of thorough knowledge is the power of teaching.

Everywhere is the same, but there is no place to be found.

What we see depends mainly on what we look for.

Never let your sense of morals get in the way of doing what's right.

I have no special talents. I am only passionately curious.

“I’ve learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.”