Actually, the problem is easy to understand. You can think about it. At different stages of life, your psychological needs are different. When you are very young, maybe a candy can make you happy for a long time. I believe it won't take long. After graduating from primary school, I believe that a candy is a way to make you happy. Maybe a game console or a favorite toy is enough. Then when you enter the society as an adult, your mood will naturally change with the increase of experience.
I think a person's life mainly goes through the following three stages:
The first is the initial stage (which is also my present stage, which I am in and will be in for a long time). The main goal of this stage is to accumulate experience, knowledge and wealth, and wealth is the most effective comparison and measure of success among the three, which is basically an important measure in the subsequent stage. For example, classmates and friends get together, ask each other how life is, talk about cars, houses and work income. And few people pay attention to whether your family is harmonious or not, whether there are problems in your body or not. Because at this stage, everyone has no energy to think about these problems that have nothing to do with wealth accumulation.
Theoretically, the next stage should be the growth period. After the initial period of different lengths, no matter what the achievements are, they will enter the growth period. Of course, whether you will enter or not varies from person to person, and your mood may not be exactly the same as your age and resources. At this stage, a person has fully assumed the responsibility of being the mainstay of the family and is in charge of the course of the family ship. This is also the most stressful stage. It is also the deepening stage of ideology acquired in the primary stage. The degree of seeing through the secular also determines this person's later achievements.
The last stage is the stable period, which can also be said to be the mature period. If a person has accumulated enough experience, knowledge and wealth, he will be calm and turn to pursuing good health and family harmony. If he doesn't get enough resources in his growth period, he can look at the achievements of his peers. If he can treat them peacefully, if he can't, he can understand that he has a bad temper and runs amok because they don't have the energy and resources to start over, which can be understood as an external manifestation of self-abandonment.
It's a little confusing I hope I can give you some help.