The most important thing in mathematics is to understand the concepts, not just to memorize formulas.
我写作是为了挑战现状,质疑既定的东西。
绝不要和愚蠢的人争论,他们会把你拖到他们那样的水平,然后回击你。
Like dear St Francis of Assisi I am wedded to Poverty: but in my case the marriage is not a success.
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.