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

正该来时，先生（老子）应时来到这世间；正该去时，先生顺时离开这世间。安于时势，顺应自然规律，哀乐就不能进入心中。

A mind conscious of its purity is attached to nothing， neither to the body nor to the soul.

The true measure of a leader is how they respond in challenging times.

记忆是一种抵抗形式。