It means: among the mountains piled up with books, diligence is the only way to reach the top of the lofty mountain successfully; In the boundless ocean of knowledge, a patient and diligent attitude towards learning will be a moving ship, which can take you to the other side of success. On the road of reading and learning, there is no shortcut and no boat to sail with the wind. In order to learn more and more knowledge in the vast mountain of books and learning, "diligence" and "assiduousness" are two indispensable and the best conditions. This sentence comes from Han Yu, a famous writer and the first of the eight masters in Tang and Song Dynasties. It is a famous saying of his scholarship and aims to encourage people to study more without fear of hardship. This sentence is also included in Augmented Xianwen.