The way we see things is affected by what we know or what we believe.
理解就是发明。
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.
数学家的工作永无止境;总有新的问题要问,新的谜题要解。