Intelligence is the ability to adapt to change.

If you think about something at three o'clock in the morning and then again at noon the next day, you get different answers...

I want to make a difference in the world.

Education is a lamp, but too many never find the switch.

The secret of joy in work is contained in one word – excellence. To know how to do something well is to enjoy it.

Every quarry has two stories: the rock formation beneath and the community around it. Wise leaders listen to both.

Leadership in energy means making tough decisions today for a better tomorrow.

The only way to save a rhinoceros is to save the environment in which it lives, because there's a mutual dependency between it and millions of other species of both animals and plants.

做出伟大工作的唯一方法就是热爱你所做的事。