All models are wrong; some models are useful

It is the merest truism, evident at once to unsophisticated observation, that mathematics is a human invention.

It is not of the essence of mathematics to be conversant with the ideas of number and quantity.

'Obvious' is the most dangerous word in mathematics.

If your kid needs a role model and you ain't it, you're both fucked.

We look at ourselves not just as a job here, but also as mentors, as role models.