अस्य सोम्य महतो वृक्षस्य यो मूलेऽभ्याहन्यात् जीवन् स्रवेत
asya somya mahato vṛkṣasya yo mūle'bhyāhanyāt jīvan sravet
In plain EnglishIf you were to strike the root of this great tree, it would bleed but live on. If the middle, the same. Life runs through the whole. That life is Sat — being.
तत् त्वम् असि
Tat Tvam Asi — That thou art, Śvetaketu
Layer 2 — What it means
A great tree is alive throughout. Strike any part of it and it responds — it bleeds from the wound but continues living. The life in it is not located in any one part. It pervades the entire tree, and the tree is an expression of it.
You are like this. The awareness in you is not located in your head or chest or any organ. It runs through the whole of you. And when the tree is cut — when you lose a limb, or a memory, or a year to illness — the life itself is not diminished. Sat, the ground of life, remains what it is.
Layer 3 — What it points to
Reading this page will give you the concept clearly. But the Upanishads were not written to be understood the way you understand chemistry or history. They were written to point toward something you can only recognise in yourself. That recognition is not on this page. This page only clears the way.
अस्य सोम्य महतो वृक्षस्य यो मूलेऽभ्याहन्यात् जीवन् स्रवेत
asya somya mahato vṛkṣasya yo mūle'bhyāhanyāt jīvan sravet
In plain EnglishIf you were to strike the root of this great tree, it would bleed but live on. If the middle, the same. Life runs through the whole. That life is Sat — being.
तत् त्वम् असि
Tat Tvam Asi — That thou art, Śvetaketu
Layer 2 — What it means
The tree analogy emphasises pervasiveness. Sat is not something added to living things from outside — it is the being-of the thing, present throughout it. Śaṅkara connects this to the antaryāmin (inner controller) concept of Bṛhadāraṇyaka 3.7: Brahman is not a controller standing apart from the controlled but the very life-ground present as all living activity. The series of analogies moves from cosmic scale (oceans) to biological intimacy (trees, sap) — each scale showing the same structure.
Layer 3 — What it points to
Reading this page will give you the concept clearly. But the Upanishads were not written to be understood the way you understand chemistry or history. They were written to point toward something you can only recognise in yourself. That recognition is not on this page. This page only clears the way.
Primary sourceChāndogya Upaniṣad 6.10. Trans. Patrick Olivelle, The Early Upaniṣads (Oxford University Press, 1998).
Layer 1 — What it literally says
अस्य सोम्य महतो वृक्षस्य यो मूलेऽभ्याहन्यात् जीवन् स्रवेत
asya somya mahato vṛkṣasya yo mūle'bhyāhanyāt jīvan sravet
In plain EnglishIf you were to strike the root of this great tree, it would bleed but live on. If the middle, the same. Life runs through the whole. That life is Sat — being.
तत् त्वम् असि
Tat Tvam Asi — That thou art, Śvetaketu
Layer 2 — What it means
In the Pañcakośa model of the Taittirīya Upaniṣad, five progressively subtle sheaths envelope Ātman: food-body, vital-breath-body, mind-body, understanding-body, bliss-body. The tree's life is not any layer of the tree but what makes each layer alive. Ātman is similarly not any sheath but what all five sheaths appear within. The progression of Chāndogya 6 from macrocosmic (ocean) to mesocosmic (tree) to microcosmic (fig seeds, 6.12) converges on the same point at decreasing scales of examination.
Layer 3 — What it points to
Reading this page will give you the concept clearly. But the Upanishads were not written to be understood the way you understand chemistry or history. They were written to point toward something you can only recognise in yourself. That recognition is not on this page. This page only clears the way.