Always try the problem that matters most to you.

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

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

I know it's a rare privilege, but if one can really tackle something in adult life that means that much to you, then it's more rewarding than anything I can imagine.

Mathematicians aren't satisfied because they know there are no solutions up to four million or four billion, they really want to know that there are no solutions up to infinity.

Pure mathematicians just love to try unsolved problems - they love a challenge.

Just because we can't find a solution it doesn't mean that there isn't one.