Abstraction allows for a kind of freedom that representation sometimes doesn't.

I have made a ceaseless effort not to ridicule， not to bewail， not to scorn human actions， but to understand them.

社会是由某些关系或行为方式联合起来的个体的集合，这些关系或行为方式将他们与那些不进入这些关系或行为方式不同的人区分开来。

The desire for verification is understandable but cannot always be satisfied.

革命是通过人类进行的，但个人必须日复一日地锻造自己的革命精神。

I say luck is when an opportunity comes along and you're prepared for it.