释义：上顺应于天，下取悦于民。使民众喜悦，人民便忘记了劳苦；用喜悦战胜困难，民众就会忘掉死亡的威胁，喜悦的作用太大了，它能勉励民众！

【译文】将知识默记在心，学习时，不感到满足，教人时，不感到倦怠，这三方面我做到了哪些呢？

真正的工艺在于让困难的事情看起来毫不费力。

The past, like the future, is indefinite and exists only as a spectrum of possibilities.

我不是因为快乐而唱歌；我因为唱歌而快乐。

The universe is a place that is full of surprises, and we are just beginning to understand its mysteries.