Behavior is determined by the current stimulus situation and past reinforcement history.

晏子春秋

The study of mathematics is like air or water to the development of science.

Belief + Doubt = Sanity.

仅仅那山学会下一而是不够的，种大需里当上如有阳光、自由，和一点花的芬芳。

真相并不总是美丽的，美丽的话语也不一定是真相。