The sun, with all those planets revolving around it and dependent on it, can still ripen a bunch of grapes as if it had nothing else in the universe to do.

有时最简单的问题会引出最深奥的理论。

颜渊感叹地说：“老师的学问越仰望越觉得高耸，越钻研越觉得深厚；看着就在前面，忽然却在后面。老师步步引导，用知识丰富我，用礼法约束我，想不学都不成。