No feeling is permanent.

Most people’s state is extremely unstable, one second is very happy, the next second may be very angry; similarly, one second is grief and indignation, the next second may be broken into tears to laugh; today is still infinite fondness for a person, the next day when we see each other again may have no feeling. Therefore, the real situation is that neither happiness nor pain, any kind of feeling will permanently occupy our hearts. After the experience, if you let you do it again, it is almost impossible to get back the previous feeling.