The harder you work, the luckier you get.
The tragedy of great power politics is that even well-intentioned states are forced to act in ways that can lead to conflict and war.
Knowledge is valuable only when it is shared.
"Innocence always calls mutely for protection when we would be so much wiser to guard ourselves against it: innocence is like a dumb leper who has lost his bell, wandering the world, meaning no harm."
如果你开心得太久，就会变得平庸。
For in the final analysis, our most basic common link is that we all inhabit this small planet. We all breathe the same air. We all cherish our children's futures. And we are all mortal.