The meaning of this sentence is: in moral cultivation, the heart cannot be forgotten and cannot be encouraged.
Don't forget that there are two explanations: Confucianism and Taoism. Confucianism: it means that in moral cultivation, don't forget and don't encourage. Taoism: refers to the formula that keeps natural for the internal changes of the body in practice.
suggestion
Mencius said "don't forget not to help", that is, taking medicine for the problem of confession. I don't know, just "gather righteousness" from my heart and work hard on "doing something".
Wang Yangming, a great scholar in the Ming Dynasty, explained: "I'm here to give lectures, but I just say' something must happen', not' I don't forget to help others'. Those who "have something to do" just "get together" from time to time. If you always use "something must happen", but sometimes it is intermittent, this is forgetting, that is, you must "don't forget"; Always use "everything happens for a reason" and sometimes want to do it quickly. This is help, that is, you must "not help". His kung fu is all used in "it will happen"; Don't forget not to help, just in the meantime.
If kung fu is uninterrupted, there is no need to say that you don't forget; I don't want to do it quickly, just don't have to say no to help. How easy this kung fu is to understand! How free and easy! Today, I didn't study hard, but insisted on "Don't forget not to help". "