The Soviet Union was a civilization of fear, where people lived in constant dread of the knock on the door at night.

"Life is either a daring adventure or nothing at all."

The most profound ideas in mathematics often arise from the simplest observations.

如果你不知道自己对什么有热情，也要知道单纯追求快乐会让人麻痹。对大多数年轻人来说，一个更好的座右铭是“掌握一些东西，无论什么东西”。通过掌握某种技能，你可以朝着能给你带来更多快乐的方向延伸发展，并最终发现你的幸福所在。