数学的历史是人类思想和进步的历史。

勤俭了就有了约束，有约束了就会各种好事都做；奢侈就放肆，放肆则各种坏事都泛滥。

Think you're escaping and run into yourself. Longest way round is the shortest way home.

The only way to learn mathematics is to do mathematics.

世界是一本书，不旅行的人只读了一页。