Could you explain the metaphor of the 'tree of worldly existence' that is mentioned in Chapter 32?

In Chapter 32, the concept of worldly existence, or samsara, is compared to a vast tree. This tree is described as having its roots above and its branches spreading immeasurably, making it difficult to comprehend. The text states that this tree is filled with the cycle of birth, death, and sorrow, and everything about it is ultimately perishable. It's called a 'tree' precisely because it is subject to 'cutting and destruction.' The chapter further explains that while this tree of worldly existence might appear pleasant from a distance, upon closer engagement, it is full of thorns that 'pierce the whole body,' illustrating the painful and transient nature of worldly attachments and experiences.