A miner's safety should never be measured in cost-benefit analyses.

In time of war, when truth is so precious, it must be attended by a bodyguard of lies.

The most profound discoveries often come from asking the simplest questions.

Sometimes the smallest characters have the biggest stories.

你唯一应该努力超越的人就是昨天的自己。

In teaching history， there should be extensive discussion of personalities who benefited mankind through independence of character and judgement.

保持开放心态的麻烦在于，人们总会坚持过来试图往里面塞东西。

"The only thing worse than being blind is having sight but no vision."