世界上主要有两类人。第一类人有所成就，第二类人号称自己有所成就。第一类人不如第二类人那么多。

The teacher's task is not to implant facts but to place the subject to be learned in front of the learner and, through sympathy, emotion, imagination, and patience, to awaken in the learner the restless drive for answers and insights which enlarge the personal life.

Knowledge is the most valuable resource in the universe.

In every line, there is a hidden truth.

否认进化史就是否认我们自己。