历史给我们的教训是，人们从来都不知道汲取历史的教训。

【释义】心境不清明，就无法领悟正道；志向不坚定，就无法成就事业。

To write is to exorcise the demons that live within us.

The essence of mathematics lies in its power to reveal patterns and symmetries.

It’s possible that a not-so smart person， who can communicate well， can do much better than a super smart person who can’t communicate well. That is good news because it is much easier to improve your communication skills than your intelligence.