By "working on it," I mean truly devoting oneself to the end result.
我所说的“身体力行”，意思是真正地致力于最终的结果。
Only by devoting oneself to the society can we find the meaning of life which is actually short and risky.
人只有献身社会，才能找出那实际上是短暂而有风险的生命的意义。
Devoting oneself will make us feel joyful, and that kind of feeling satisfaction will help you to devote continuously.
付出会让人觉得愉悦，而那种心满意足的感觉，又会再帮助你继续付出。
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