One of the most haunting images in the Upanishads. The world as an inverted tree: its roots in the unchanging, its branches spreading downward into multiplicity. To be free is to cut the tree and recognise what the roots are.
The fig tree (aśvattha) with its roots above and branches below. It is an image of the world as it actually is — not as we ordinarily perceive it.
We experience the world as rooted in the ground beneath us and growing upward: solid earth below, trees rising, sky above. This is the apparent order — from matter upward to consciousness, from the low to the high. But the Upanishad inverts this: the real root is above, in the unchanging, in Brahman. The branches — all the multiplicity of the world of names and forms, of births and deaths, of cause and effect — hang downward from that root.
The image is not claiming the sky is actually below the earth. It is making a metaphysical point: what everything depends on is not the lowest stratum but the highest. Brahman is not the product of a long chain of causes ascending from matter — Brahman is what all causes, including matter itself, hang from. The world of multiplicity is not the ground of consciousness; consciousness is the ground of the world.
The Bhagavad Gītā (15.1–3) returns to this image and adds the instruction: cut this tree with the sharp weapon of detachment (asaṅgaśastreṇa dṛḍhena chitvā). Not destroy the tree — cut it. Recognise the inversion. Stop taking the branches for the root. That recognition is liberation.
The aśvattha tree image appears in three places in the canonical texts: Kaṭha 2.3.1, Bhagavad Gītā 15.1–3, and (with variations) in the Bṛhadāraṇyaka's cosmological descriptions. The Kaṭha version is the most compressed. Its force comes from the single inversion: ūrdhvamūla (root above) + avākśākha (branches below). Everything else follows from this structural claim.
Śaṅkara's commentary identifies the tree explicitly: the mūlam (root) is Brahman — unchanging, pure, the support of all. The śākhāḥ (branches) are the guṇas (qualities of prakṛti), the senses, and the sense-objects — all the constituents of the empirical world. The adhas ca mūlānyanusantatāni (further roots hanging down below) from the Gītā version are the secondary roots of karma that grow downward, binding the tree further in the soil of action and consequence.
The tree is called sanātana — eternal, ancient. The world of saṃsāra is not new. It has always been structured this way. The mistake is not something that happened recently; it is the beginningless superimposition of self on not-self that has always been in place. The tree has always had its roots above. The recognition is not the creation of a new fact but the seeing of what has always been the case.
The instruction to "cut the tree" requires careful interpretation. Śaṅkara and the tradition are clear that the instruction is not literal — the world of appearances does not literally disappear at liberation. The cutting is the removal of the identification with the branches: the cessation of the mistaken belief that the branches are the root, that the world of multiplicity is self-sufficient and self-grounding. After the cutting, the tree remains visible — but it is seen correctly: as branches hanging from an invisible root, as appearances within the consciousness that is their ground.
The word asaṅga (non-attachment) in the Gītā's version of this instruction is the weapon. Asaṅga is not emotional coldness or indifference. It is the recognition that the things one is attached to are branches, not roots — and that what one is actually seeking (the root, the unchanging, the ground) is already present as one's own nature. When this is genuinely seen, attachment does not need to be suppressed; it falls away because the misidentification that generated it has been dissolved.