Could you explain the metaphor of the parrot tied to a tube that is mentioned in the text?

The metaphor of a parrot tied to a tube, found in Chapter 17, serves as a powerful illustration of the human condition. In this analogy, the soul or the true self is the parrot, which is naturally free and meant to soar. However, it has become bound to a tube, which represents the physical body and worldly entanglements. The text explains, "you have become bound by the company of the body, like a parrot tied to a tube." The advice given is to recognize this self-imposed bondage, which arises from the delusion of 'me and you,' and to 'release the feet that are held tight... and fly high in the sky,' symbolizing the act of attaining liberation by transcending bodily identification.