I always try to be grateful for every opportunity.

世界上有很多好人。如果你找不到一个，那就成为一个。

Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.

最大的残忍是我们对他人绝望的随意忽视。

Innovation in mining technology is essential to meet the world's energy demands.