Stay true to yourself and never let anyone change you.

A person is never happy except at the price of some ignorance.

We don't just mine coal, we power the nation.

Don't get involved in partial problems, but always take flight to where there is a free view over the whole single great problem, even if this view is still not a clear one.

生命不是一种问题需要被解决，而是一种现象需要被经历。