Everyone has the right to doubt everything as often as he pleases and the duty to do it at least once. No way of looking at things is too sacred to be reconsidered. No way of doing things is beyond improvement.

This is not about charity, it's about justice... The war against terror is bound up in the war against poverty - I didn't say that, Colin Powell said that . . .

You can't dig a different hole by digging the same one deeper.

We need creativity in order to break free from the temporary structures that have been set up by a particular sequence of experience.

Creative thinking is not a talent, it is a skill that can be learned. It empowers people by adding strength to their natural abilities which improves teamwork, productivity and, where appropriate, profits.

Argument is meant to reveal the truth, not to create it.

Logic will never change emotion or perception.