Tao hides its light, and darkness is darkness. The so-called "hiding its light" or "hiding its light and darkness" means converging its edges and hiding it. Semantically speaking, this is a neutral word, depending on the context in which it is used and for whom. "Wang Mang is modest and does not usurp the throne", which can also be called "keeping a low profile". This kind of "keeping a low profile" can also be called "the trick of schemers and careerists". But in more cases, "keeping a low profile and keeping a low profile" is a last resort for self-protection. China people have a lot of protection needs, which is a last resort. China people have many aphorisms, all of which are related to the word "hide your strength and bide your time". "The wood in the forest is beautiful, and the wind will destroy it." This "wind" is the world wind; The "gun" of "shooting the first bird" is probably the patent of the powerful. Throughout the ages, especially those talented and ambitious courtiers have relied on the monarch and often need to hide in front of the monarch who can decide the life and death of courtiers. Obviously talented people have to hide their talents, while obviously ambitious people have to hide their ambitions, just like pretending to be deaf when they are talking, which is actually a very painful thing. It's just a sword. I have to charge for you, but I'm afraid you'll kick down the ladder. How much bitterness and inevitability are involved in this, and what is the crime?