You should avoid sloth and unreliability.
1985年2月的一次演讲时所说
I think that the most important thing in life is to be true to yourself.
Profitability and environmental stewardship can—and must—go hand in hand.
我们能体验到的最美丽的东西是神秘的。它是所有真正艺术和科学的源泉。
Our miners are the hardest working people in America.
Curiosity is the engine that drives scientific discovery.