Ideas that enter the mind under fire remain there securely and forever.
在炮火下进入脑海的思想会牢固而永久地留在那里。
The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
Nature tends to produce constancy in all her works, but she does not always succeed.
成功不在于你赚了多少钱，而在于你对人们生活的影响。
在爱情中我们都是傻瓜。