The only way to improve is to challenge yourself against the best.

The world needs responsible mining now more than ever.

出自先秦《荀子·强国》。一个人知道爱惜生命、安于快乐而抛弃礼义，那就好比想长寿而自刎其颈一样。此以比喻来说明坚守礼仪对于“贵生乐安”的重要性，强调治国安邦不可缺失礼义的意义。

A novel is never finished, only abandoned.

时代在变。

学校必须是一个让孩子学会将眼前欲望服从于更大社会利益要求的地方。