The external environment (objective physical environment) is the external environment, and the internal environment (human inner environment) is the internal environment. The logical rules of the two are completely different. Most people know a lot about the rules of the external environment, but know less about the internal environment. Self-reflection and summary are one of the important means to understand the internal environment. Only when personal behavior decisions are consistent with the external objective environment to the greatest extent, can you have the greatest possibility of meeting your own needs and goals.