A problem is something you can do something about. If you can't do something about it, then it's not a problem, it's a predicament. That means it's something that must be coped with, endured.

Experience is of particulars only.

There is nothing more inspiring than having a mind unfold before you. Let people teach who have a calling. It is never just a job.

Mathematics is not yet capable of coping with the naïveté of the mathematician himself.

Every discipline develops standards of professional competence to which its workers are subject... Every scientific community is a society in the small, so to speak, with its own agencies of social control.

We are forever asking Nature whether it has stopped beating its wife.

The price of training is always a certain trained incapacity: the more we know how to do something, the harder it is to learn to do it differently.