As the spirit of all things, human beings are unique in that they have the ability to think, but thinking must be learned and cultivated in order to be successful.
　　According to the author, there are three types of thinking that are most fundamental and important for personal development and success, one is critical thinking, the other is creative thinking, and one is positive thinking.

The first four methods belong to critical thinking, that is, semanological analysis, logical method, scientific method and fallacy analysis, which can be summarized into two key points: clear thinking and correct reasoning; the latter two rules correspond to creative thinking and positive thinking, which are different from critical thinking, the focus of creative thinking and positive thinking is not on thinking methods, but on mentality, such as relaxation, humor, optimism and courage. The development of human civilization depends on these three kinds of thinking, which are aggressive, critical and creative.