The molecules that mediate pain are ancient, revealing how deeply rooted this sensation is in evolution.

称为颜子，没有不高兴的，虽颜回贫贱短寿。称人为盗跖，没有不发怒的，虽发不义之财且长期寿。

Success is not an entitlement. It has to be earned.

自由是每个人做他想做的事情的自然能力，除非受到暴力或法律的禁止。