真相并不总是美丽的，美丽的言辞也不一定是真相。
当我们为后代考虑而采石时，石头就变成了桥梁，而不仅仅是资源。
Knowledge has value only insofar as it contributes to the liberation of humanity.
学习新编程语言的最好方法是用它编写程序。
深度学习是解决复杂问题的强大工具。
Fearless is not the absence of fear. It’s not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things that scare you to death.