We have to come back to something like ordinary language after all when we want to talk "about" mathematics!

Nature does not consist entirely, or even largely, of problems designed by a Grand Examiner to come out neatly in finite terms, and whatever subject we tackle the first need is to overcome timidity about approximating.

*Methods of Mathematical Physics*

Some of the most important results (e.g. Cauchy's theorem) are so surprising at first sight that nothing short of a proof can make them credible.

*Methods of Mathematical Physics*