Success is not final, failure is not fatal: it is the courage to continue that counts.

Purposive behavior in animals and men.

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

心理学必须始终问：这如何帮助有机体生活？

You are never too old to set another goal or to dream a new dream.

建筑必须有能力带来惊喜和愉悦。