Logic will never change emotion or perception.

Don't criticise a hypothesis, come up with a better one.

In a sense, words are encyclopedias of ignorance because they freeze perceptions at one moment in history and then insist we continue to use these frozen perceptions when we should be doing better.

Analysis is simplifying, breaking down things into parts, picking out strands and elements. Analysis is comparing unknown things with things that are known. Analysis also involves picking out relationships and putting them back together as a whole.

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.

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.

Unhappiness is best defined as the difference between our talents and our expectations.