Complacency is the enemy of progress.
自满是进步的大敌。
The more you suffer, the more you enjoy the success.
It has always been easy to hate and destroy. To build and to cherish is much more difficult.
《盐铁论·轻重》茂密的树林下面没有旺盛的青草;在没有平整的地里,长不出好的禾苗。比喻在强大的势力下,弱者会受到压制和侵害。
身体为灵魂提供了一个照料和使用的工具。