I am always amazed how much a certain facility with a special and apparently narrow technique can accomplish. - Stanisław Ulam

It was not so much that I was doing mathematics, but rather that mathematics had taken possession of me.

Do not lose your faith. A mighty fortress is our mathematics. Mathematics will rise to the challenge, as it always has.

In its evolution from a more primitive nervous system, the brain, as an organ with ten or more billion neurons and many more connections between them must have changed and grown as a result of many accidents.