Internal determines external, and intangible determines tangible, which means that internal and intangible things determine external and tangible things. A person's inner meaning refers to his thoughts, beliefs and values, which will determine his external behavior and performance. Intangible things refer to things that are invisible and intangible, but have a profound impact on human life, such as air, magnetic field and electric field. These intangible things will also have an impact on tangible things, such as air quality will affect human health, electromagnetic fields will affect the normal work of electronic equipment and so on.