The essence of causal inference is to go beyond the data and ask what would happen if we intervene.

The development of the vital forms under the influence of external conditions is a subject of the highest importance.

Every one is their God,if you give up on yourself,who else will save you?Every one is busy,some are busy livig,some are busy dying,and you, who are busy chasing fame and fortune,who are busy with daily necessities,try to stop to think a second:if your brain has been institutionalized?Where is your God?

译文：青春容易逝去，学问却很难获得成功，所以每一寸光阴都不能轻易放过。赏析：生命短暂，学问却无穷尽，我们要在有限的生命里去追求高深的学问。不要待到岁月逝去时，才后悔莫及。

我不是一个相信后悔的人。我相信活在当下并充分利用它。