The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

Mathematics is good for the soul, getting things right enlivens a sense of truth, efforts to understand automatically purify desires.

I find enough mystery in mathematics to satisfy my spiritual needs. I think, for example, that pi is mysterious enough (don't get me started!) without having to worry about God. Or if pi isn't enough, how about fractals? or quantum mechanics?

What can be more discouraging to a man than to doubt if his soul be material, like a stone or a reptile, and subject to corruption like the vilest creatures ? And does it not prove much more strength of mind and grandeur to be able to conceive the idea of a Being superior to all other beings, by whom and for whom all things were made; of a Being absolutely perfect and pure, without beginning or end, of whom our soul is the image, and of whom, if I may say so, it is a part, because it is spiritual and immortal?

This, therefore, is mathematics: she reminds you of the invisible form of the soul; she gives life to her own discoveries; she awakens the mind and purifies the intellect; she brings light to our intrinsic ideas; she abolishes oblivion and ignorance which are ours by birth.

That was what drew him to mathematics. Not because it was rarefied, but because it probed to the subtle, deeper reality. People said that mathematicians were unworldly, and yammered on about how Einstein couldn’t make correct change. Nonsense. Einstein just didn’t give a damn. It was the subtle, the beautiful that concerned him.