We've lost something that's been with us for so long, and something that drew a lot of us into mathematics. But perhaps that's always the way with math problems, and we just have to find new ones to capture our attention.

But the best problem I ever found, I found in my local public library.

Fermat said he had a proof.

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

However impenetrable it seems, if you don't try it, then you can never do it.

Always try the problem that matters most to you.

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