最伟大的发现是人类可以通过改变心态来改变生活。

Sustainable development is not an option, but a necessity for the coal sector.

我不同意你说的话，但我愿意为你说话的权利而献出生命。

The study of truth requires a considerable effort - which is why few are willing to undertake it out of love of knowledge - despite the fact that God has implanted a natural appetite for such knowledge in the minds of men.

We come nearest to the great when we are great in humility.

孩子不是从更重要的工作中分心的事物，他们本身就是最重要的工作。