It is rare to regard black as black, but it is more common to regard black as white, so this person doesn't know the difference between black and white (the two sides of contradiction are transformed into each other)

Whether they are born together or not, it is difficult to complement each other. Their lengths are relatively high and their sounds are harmonious.

The world is not weaker than water, and the strong cannot win, so it is easy. Weakness is better than strength, softness is better than strength, and the world knows everything. Therefore, the sage said: "being defiled by the country is to be the master of the country;" It is unlucky to accept the country, because it is the king of the world. "If it is the opposite.

Good medicine tastes bitter and is good for illness, but advice when most unpleasant is good for action.