Practice or activity stems from desire, not reason. Reason can only distinguish right from wrong without causing any activity. Desire, on the other hand, can cause activities, but it cannot distinguish right from wrong. Desire can obey reason or oppose it.
The desire to obey reason leads to a good choice, and the desire to oppose reason leads to a bad choice, and morality lies in this good choice, so morality fundamentally comes from the unity of desire and reason.
Furthermore, desire is caused by feelings, which are divided into pleasure and pain. Happiness comes from hobbies, and pain comes from disgust. Anyone who loves something can be happy because of it, so people who love morality can be happy because of it. Therefore, morality and happiness are not incompatible.
It is not easy to be a moral person until you get into the habit. However, once the good habit of choice is formed, moral activities can bring happiness, and then induce us to choose to do moral things.
So it is not difficult to be a moral person. Special attention should be paid to forming a good habit from an early age, because since good habits are particularly helpful to improve people's happiness, bad habits will naturally damage people's happiness.
All human activities are aimed at obtaining some kind of happiness. The difference lies in different types of happiness and different degrees of perfection. Since moral activity is an activity, it is no exception. It is also to pursue some kind of happiness.
The human mind can be roughly divided into three parts, namely, nutrition and reproduction, feeling and desire, mind and reason. Because morality is closely related to practice and activities, its purpose is to pursue the happiness of feelings and desires in the human soul.
Since morality is a good habit of choice, like archery, it has a goal, that is, human happiness, so like archery, it needs to adjust and improve the hit rate according to the feeling in practice. Therefore, it is a fallacy to say that moral principles are wrong and feel them.