革命就像骑自行车，如果不前进就会倒下。

To be disconnected from the land is to be disconnected from ourselves.

The most dangerous worldviews are the worldviews of those who have never viewed the world.

Purify the soul through meditation.

释义：圣人之所以成为圣人，关键在于内心纯粹地符合天理，而不在于才学和能力的大小。所以即使是平凡的人，只要愿意学习，使自己的内心纯粹地符合天理，那么也可以成为圣人。