Every ton of coal we extract carries a responsibility—to our workers, communities, and the planet.

改变的秘诀在于集中所有精力，不是对抗过去，而是建设未来。

科学是照亮我们前进道路的火炬。

The best way to predict the future is to create it.

〈军人精神教育〉，在桂林对滇赣粤军的演说，1921年12月10日

"The freedom to be yourself is a gift only you can give yourself. But once you do, no one can take it away."

"The only limit to our realization of tomorrow is our doubts of today."

In a state, the liberty of one citizen is a menace to the liberty of another.