
Krishna introduces one of the Gita's most powerful metaphors: the material world as an upside-down tree. 'Ūrdhva-mūlam adhaḥ-śākham'—roots upward, branches downward. This reverses normal perception. The tree is 'aśvatthaṁ avyayam'—imperishable, eternal. But it's not eternal in a positive sense—it's the eternal cycle of material existence that traps you. 'Chandāṁsi yasya parṇāni'—the Vedas are its leaves. This means the Vedas describe the material world, its laws, and its entanglements. 'Yas taṁ veda sa veda-vit'—who knows this tree knows the Vedas. But merely knowing isn't enough—you must cut it. The tree represents everything that binds you: desires, attachments, karma, the complex web of material existence. Its roots are above because they're in the spiritual realm, but the branches spread downward into the material world, entangling you. To be free, you must understand this tree and then cut it with detachment.
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