That particular odyssey is now over. My mind is now at rest.

There are proofs that date back to the Greeks that are still valid today.

The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.

I really believed that I was on the right track, but that did not mean that I would necessarily reach my goal

The only way I could relax was when I was with my children.

I was so obsessed by this problem that I was thinking about it all the time - when I woke up in the morning, when I went to sleep at night - and that went on for eight years.

Perhaps I could best describe my experience of doing mathematics in terms of entering a dark mansion. You go into the first room and it's dark, completely dark. You stumble around, bumping into the furniture. Gradually, you learn where each piece of furniture is. And finally, after six months or so, you find the light switch and turn it on. Suddenly, it's all illuminated and you can see exactly where you were. Then you enter the next dark room.