There is no doubt that there will be doubts in learning. If there is doubt, there will be progress. If there is little doubt, there will be small progress. If there is great doubt, there will be great progress.

This sentence comes from the famous Song Dynasty philosopher Lu Jiuyuan's "Lu Jiuyuan's Collection of Quotations", which means that when you study and learn, you are afraid of not being able to find problems. Only by studying with problems can you make progress. That is to say, "Learning is valuable but doubtful", "It is better not to study than to study by rote", "to apply what you have learned", "to learn to solve doubts", etc.

Appreciation

This is a question about learning attitude. The author believes that you must constantly ask questions during learning, and if you learn with questions, you will make progress. This view is correct. Because if you have questions, it means you don’t understand something and there are deficiencies in your knowledge. It also means there is a need to solve questions and a desire to keep learning.

Through asking for advice and studying, questions will be solved, learning will inevitably improve, and knowledge will continue to increase. If there are no questions and never want to ask questions, this means that learning is at a standstill and there will be no improvement. This pair of scholars is a formidable enemy. As a scholar, we must keep in mind that “when in doubt, there is progress.”