Chapter 20 explained simply

20. 1. When we renounce learning we have no troubles. The (ready) 'yes,' and (flattering) 'yea;'-- Small is the difference they display. But mark their issues, good and ill;-- What space the gulf between shall fill? What all men fear is indeed to be feared; but how wide and without end is the range of questions (asking to be discussed)! 2. The multitude of men look satisfied and pleased; as if enjoying a full banquet, as if mounted on a tower in spring. I alone seem listless and still, my desires having as yet given no indication of their presence. I am like an infant which has not yet smiled. I look dejected and forlorn, as if I had no home to go to. The multitude of men all have enough and to spare. I alone seem to have lost everything. My mind is that of a stupid man; I am in a state of chaos. Ordinary men look bright and intelligent, while I alone seem to be benighted. They look full of discrimination, while I alone am dull and confused. I seem to be carried about as on the sea, drifting as if I had nowhere to rest. All men have their spheres of action, while I alone seem dull and incapable, like a rude borderer. (Thus) I alone am different from other men, but I value the nursing-mother (the Tao).