释义：他认为气不仅是万物的起源，也是万物的归宿，万物在气的循环中生生不息。
爱惜生命，就别浪费时光，因为生命是由时间堆砌而成。
The state is the people organized for law.
To understand behavior, look for the utility in it.
True courage is not the absence of fear, but moving forward despite it.
一本书是通向想象力和知识的敞开之窗。
