“The game of life does not proceed like a mathematical calculation on the principle that two and two make four. Sometimes they make five, or minus four, and sometimes the blackboard topples over in the middle of the sum and the pedagogue is left with a black eye. ”

“The greatest lesson in life is to know that even fools are right sometimes.”

“I don't like mixing up moralities with mathematics.”

“Sometimes doing your best is not good enough. Sometimes you must do what is required.”

“You make a living by what you get. You make a life by what you give.”

“I had a feeling once about Mathematics - that I saw it all. Depth beyond depth was revealed to me - the Byss and Abyss. I saw - as one might see the transit of Venus or even the Lord Mayor's Show - a quantity passing through infinity and changing its sign from plus to minus. I saw exactly why it happened and why the tergiversation was inevitable but it was after dinner and I let it go.”

“It is not enough that we do our best; sometimes we must do what is required.”