Love is the hardest to last, so people with rich feelings will eventually become shallow and heartless. Nature has some common sense, so a person who acts spontaneously will never lose his nature.
On the one hand, love is bitter, on the other hand, love is hard to last. Love is a kind of persistence, so it must not be bitter; Love is an elusive yearning, so it is difficult to master. In addition, life is short and the environment is changeable, so people can't see their hearts, but they can't see people. After all, there are a few people who can get temporary joy from love, but they are impermanent and eager for quick success, and the people they love cannot compete with the destruction of life and death. Therefore, sentimental people tend to stay away from martial arts feelings and become heartless after being prepared to play tricks.
Willfulness is not presumptuous, but a return to nature and obedience. Before being tempted by the outside world, human nature is naive, free and happy. But because of the division of various material desires, fame and wealth, knowledge, it is easy to be deceived. However, this nature has not been lost. When people get rid of material fatigue and forget dust and labor, it will appear again. Therefore, people who act spontaneously still lose their humanity, while those who indulge in debauchery lose their nature because of fetishism.