"In mathematics, you don't understand things. You just get used to them."
在数学中,你不是理解事物,你只是习惯了它们。
The healthy social life is found when in the mirror of each human soul the whole community finds its reflection, and when in the community the virtue of each one is living.
A mathematician's work is never done; there are always new questions to explore and new mysteries to uncover.