如果你的艺术不能挑战你自己，它也无法挑战他人。
If your art doesn’t challenge you, it won’t challenge anyone else.
A proof is a device for convincing someone else that a mathematical statement is true.
The true journey is not about discovering new landscapes, but about seeing with new eyes.
金融市场的健康发展需要各方共同维护。
我不是说唱歌手，我是一个德语的传奇。
登山不论遇到什么艰难险阻都不停止脚步，就一定能够登上山顶。