永远不要停止相信自己。
我不害怕风暴，因为我正在学习如何驾驶我的船。
唯一确定的是不确定性。
To this day, I have never taken a course anywhere, in chemistry, economics, psychology, or business.
时至今日，我从未在任何地方选修过化学、经济学、心理学或商业课程。
The study of mathematics is like air or gravity—it is everywhere, and you can't see it, but you know it's there.