The sentence about the relationship between "learning" and "thinking" is: learning without thinking means nothing, thinking without learning means peril.

It means that if you just read without thinking, you will not be able to use the knowledge in the book reasonably and effectively because you cannot deeply understand the meaning of the book, and you will even get confused.

If you just dream without actually studying and studying, you will end up building a tower on sand and gain nothing. It warns us that only by combining learning and thinking can we learn practical and useful knowledge, otherwise we will have little effect.

The ancients’ famous sayings about reading:

1. There is no greater happiness than reading, and no greater pleasure than teaching children. ——"Lianbi of Proverbs" by Jin Ying of the Qing Dynasty

Vernacular translation: The greatest happiness is reading, and the most important thing is teaching your children.

2. Work hard to know all the words in the world, and resolve to read all the books in the world. ——Couplet by Su Shi, a poet of the Northern Song Dynasty

Vernacular translation: Work hard to know all the characters in the world, and resolve to read all the books in the world.

3. It is better to have no book at all than to believe in the book. ——"Mencius·Ding Xin Xia" by Mencius and his students during the Warring States Period

Vernacular translation: If you fully believe in "Shang Shu", it would be better not to have "Shang Shu" at all.