The really important thing is not to live, but to live well. And to live well meant, along with more enjoyable things in life, to live according to your principles.

The only true wisdom is in knowing you know nothing.

Falling down is not a failure. Failure comes when you stay where you have fallen.

When the debate is lost, slander becomes the tool of the loser.

The secret of happiness, you see, is not found in seeking more, but in developing the capacity to enjoy less.

I know that I am intelligent, because I know that I know nothing.

Awareness of ignorance is the beginning of wisdom.

There is no possession more valuable than a good and faithful friend.

True wisdom comes to each of us when we realize how little we understand about life, ourselves, and the world around us.

If you want to be wrong then follow the masses.

I am a Citizen of the World, and my Nationality is Goodwill.

Suck on this, Edward.

(Responding to a sneeze from the audience) Who exploded?

Power of generalizing gives men so much the superiority in mistake over the dumb animals.

I knew that when the great guiding spirit cleaves humanity into two antagonistic halves, I will be with the people.

Don't think that some tomorrow you'll see God's Light. You see it now or err in darkest night.

I don’t often know who should read what book. It’s a little bit like trying to set people up on a date - a good match is unpredictable and mysterious.

My parents were very well read. They were both New Englanders, not highly educated, but they had a sophisticated... they were both very humanistic, and they were sophisticated readers.

The challenge that climate change presents to us, both in Australia and around the world, won't be solved by ramping up the nuclear industry.

I love all of the Earth.

Off the field I'm down to earth. I'm a very caring person. I'm a very giving person.