What does Zhuangzi mean by "nothing at first"

Start and finish, that is, see through everything and directly understand the state of the world before it sprouts. This is the supreme understanding.

The second understanding is that "there is something, and there is a seal from the beginning", that is to say, only knowing what is there does not distinguish everything. The second understanding is that "there is a seal, and there is right and wrong from the beginning", that is to say, although I see the difference of things, I don't judge right and wrong. The worst thing is to distinguish right from wrong and get lost.