What do you mean by benevolence and hiding all kinds of uses?

The application of showing benevolence and changing one's mind; Benevolence, advantage, benefit, function, this meaning. Meaning: When using Yi Gua, we can see various educational and health-preserving functions of Tao and things from Yi Gua. Hide all uses, hide, and easy to use; Use or refers to Tao, the benefits and functions of Tao. It means: if you don't change your mind, the educational and health-preserving functions of Tao and things will be as intangible as changing your mind. Explicit and implicit have double meanings, and it is easy to show the benevolence of debut. It is easy to hide the purpose of Tao. This shows that Yi Gua is the means of expression of Tao, and Tao is the root of the origin of Yi Gua, and Yi Gua and Tao are inseparable.