The coal industry must evolve to meet modern environmental standards, or it will become obsolete.

The first duty of a man is to think for himself.

幸福晚年的秘诀在于要有好的记性和坏的记性。

Wise men talk because they have something to say; fools, becasue they have to say something.

The greatest threat to our forests isn’t logging—it’s indifference.

The customer’s voice should always be the loudest in the room.

在热闹繁华中如果能够保持理性，才不至于迷失，也就省去了许多徒慕虚荣的苦心；困境中，在人生的低谷期，若能保持一份乐观，才会有一番更为真切的人生感悟。

We don't just manufacture chemicals; we enable progress.