The door is a symbol of secrecy, avoidance, and a secret struggle of solitude or sorrow in the soul. A house without a door is not a room, but a corridor. No matter where a person is, as long as he is in a closed door Later, he can free himself. In the closed door, the work of the mind is most effective. Man is not a herd of horses grazing together. What is the exact understanding of this passage? ['People need to have a door to eliminate external interference in order to improve their thinking skills.', 'People need a door to live freely and autonomously.', 'People are not herding horses together, relying on the door to do some necessary avoidance.', 'People have thoughts and feelings and need to have their own independent world.']