The meaning of learning:

Stones from other mountains can be used to attack jade. ("The Book of Songs·Xiaoya·Heming")

There is no beginning in adversity. Xian Ke has an end. ("The Book of Songs·Daya·Dang")

The mountains look up and stop, and the scenery stops. "The Book of Songs·Xiaoya·Futian Zhishi·Chejia"

Many people in later generations spoke highly of the Book of Songs. Let me quote Confucius and Mencius.