Be knowledgeable, interrogate, think carefully, distinguish clearly and persist. There are Fu Xue, thinking Fu De and Fu CuO; There are Fu Bian, Fu Ming and Fu CuO; There are blessings, blessings, blessings. People can do it once, and it has been a hundred times; People can do it in ten ways, there are thousands. Can do this, stupid is wise, soft is strong.

Chapter 19 of The Doctrine of the Mean

Extensive study, detailed inquiry, careful thinking, clear identification and practical implementation. Either don't learn, or don't stop learning; Either don't ask, don't stop if you don't understand; Either don't want to, think about it and never give up; Either you don't distinguish, you won't stop until you distinguish clearly; Either don't carry it out, don't stop until you carry it out. What others can do with a little effort, I will do with a hundred times of effort; What others have made great efforts to do, I have done it with 1000 efforts. If you can really do this, you can be smart even if you are stupid, and you can be strong even if you are weak.