我从不回头看，我向前看。

Natural selection is cruel。

The more you know yourself, the more patience you have for what you see in others.

Mastery is not a function of genius or talent. It is a function of time and intense focus applied to a particular field of knowledge.

解释：药物之间有阴阳、子母、兄弟等配对关系，说明药物配伍的原理。