It's nice to look back on your life and see things as lessons, and not regrets.

My stepmother sold my birth certificate and someone asked why I didn't buy it back. I don't know, really. I just couldn't bring myself to do it. It was mine. It cost me nothing and suddenly I had to buy it back.

I was so ashamed of who I was, a kind of semi-racist, which didn't make sense.

I have deeply regretted that I did not proceed far enough at least to understand something of the great leading principles of mathematics, for men thus endowed seem to have an extra sense.

In 1998 when I did the album 'Blue,' that was my worst phase.

MY greatest regret in life is that I never became the heavyweight boxing champion of the world.