This sentence comes from Han Yu, a famous writer and the first of the eight masters in Tang and Song Dynasties. This sentence is included in "Glory and Contribution", which is a famous saying of his scholarship. It aims to encourage people to study more without fear of difficulties, and only hard work can lead to success.
If you want to reach the summit of the lofty mountain of knowledge successfully, diligence is the only way to reach the summit; If you want to swim in the boundless ocean of knowledge, patience, diligence and hard work will be a sailing ship, which can take you to the other side of success. On the road to study, there is no shortcut, and there is no boat sailing with the wind. If you want to learn more and more knowledge in the mountains of books and knowledge, "diligence" and "assiduousness" are two essential and best conditions, so diligence is the key point of learning.