The last part, the part you're now approaching, was for Aristotle the most important for happiness.

Some of you read with me 40 years ago a portion of Aristotle's Ethics, a selection of passages that describe his idea of happiness. You may not remember too well.

I've learned a lot about good and evil. They are not always what they appear to be.

Because the world is radically new, the ideal encyclopedia should be radical, too.

I worked hard at memorizing lists of facts and figures, and carried with me a book of facts.

I hoped that it would be possible to slide slowly from my public life back to the life of teaching and writing that I had always wanted. But things didn't work out that way.

I was involved, deeply involved, in a deception... I have deceived my friends - and I had millions of them.

I cannot take back one word or action; the past does not change for anyone.