真相往往存在于矛盾中。

个人的就是普遍的，普遍的也是个人的。

Complexity is the enemy of execution—keep solutions simple.

The world is full of obvious things which nobody by any chance ever observes.

The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life. You can turn over a new leaf every hour if you choose.

可信因果推断的关键不仅是方法，还有方法与当前问题的契合度。