The snake has to shed his skin before he can grow.
在生命中寻找意义的努力是人类的主要动力。
User experience outweighs commercial interests.
解析：学习圣人之道应遵从孔孟教诲。
出自《抱朴子·备阙》。使用弹弓打鸟，泥丸比千金更适用。