数学家是模式的创造者，就像画家或诗人一样。
A mathematician is a maker of patterns, like a painter or a poet.
There is no reason why good cannot triumph as often as evil. The triumph of anything is a matter of organization.
The only way to understand life is to live it.
Be kind, for everyone you meet is fighting a hard battle.
如果用心一旦松散，那么万事都做不好。如果用心一旦粗疏，那么凡事不能聚精会神。用心一旦固执，凡事就不能见其本来面目。