How does Chapter 32 use the metaphor of a tree to explain worldly existence?

In a philosophical section, Chapter 32 uses the powerful metaphor of a tree to describe worldly existence. This 'tree of worldly existence' is described as having its roots above and its branches spreading immeasurably, originating from the unmanifest. It is born from ignorance, desire, and karma. The chapter further elaborates that its leaves are desires and cravings, while possessions like wealth, grain, sons, and wife form its extensive spread. As explained in Chapter 32, this tree is fundamentally essenceless, like a plantain trunk, and though it may appear pleasant from afar, it pierces with thorns when embraced. It is a perishable entity, constantly changing and bound by the waters of desire.