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.

If you never change your mind, why have one?

Only the human brain can deliberately change perceptions, change patterns, invent concepts and tolerate ambiguity.

Intelligence is something we are born with. Thinking is a skill that must be learned.

Asking a question is the simplest way of focusing thinking...asking the right question may be the most important part of thinking.

A person who knows all the answers, has an opinion on everything, has a certainty backed up by rational argument, has very little possibility of further progress. Such a person is unlikely to walk away from a discussion with anything more than a reaffirmation of how right he or she has been all along.

One can think of a secretary actively operating a filing system, of a librarian actively cataloguing books, of a computer actively sorting out information. The mind however does not actively sort out information. The information sorts itself out and organises itself into patterns. The mind is passive. The mind only provides an opportunity for the information to behave in this way. The mind provides a special environment in which information can become self-organising. This special environment is a memory surface with special characteristics.