How to understand human nature, what methods and related books are there?

The core essence of human nature: pursuing happiness and avoiding pain. To put it bluntly, it is the pursuit of things and colors to avoid physical diseases and psychological defects. Among them, the desire to escape pain is far greater than the desire to pursue happiness. Things: things that represent entities, money, things, houses, cars, ... colors: intangible things, power, love, fame, colors ... and of course, there are many combinations of things and colors, such as luxury goods. ) Using the above two points, we can make good use of human nature. Communicating with people, or starting a business, is actually an exchange of "interests". This benefit not only refers to economic benefits, but also includes the help you can give each other. Combine yourself and think about what resources you have to provide "benefits" to others; Put yourself in others' shoes. What does he want? Read more books on psychology. Such as influence, David Myers's social psychology and so on.