真相很少是纯粹的，也从来不简单。

研究历史就是学习时间的语法。

The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.

The only thing you can do is give all you have on that particular day.

发现的兴奋永远不会消退。