My thinking was taught to tribes in South Africa like the Zulus and Xhosas. At the time there were about 210 fights breaking out among them every month, but after they listened to my lessons, this fell to just four.

Happiness is for those who don't really need it. So I can live without happiness.

Dealing with complexity is an inefficient and unnecessary waste of time, attention and mental energy. There is never any justification for things being complex when they could be simple.

Everywhere I go, I see very much the same thing. I see the same compassion for people who live half a world away. I see the same concern about events beyond these borders. And, increasingly, I see the same conviction that we can and we must join together to stop the scourge of AIDS and poverty.

I think there is a danger with young people of being dependent in the sense that they don't acquire any identity or self-image of themselves as thinkers.

People should realize we're jerks just like them.

Removing the faults in a stage-coach may produce a perfect stage-coach, but it is unlikely to produce the first motor car.