Yogācāra and Advaita Vedānta — Two Idealisms, Two Metaphysical Anchors

Both traditions hold that consciousness is more fundamental than any supposedly external world. Both argue that what naive realism takes to be independent external objects are actually within consciousness, not outside it. Both develop sophisticated analyses of the structure of experience — Advaita through vivartavāda (apparent transformation), Yogācāra through the doctrine of the three natures (trisvabhāva).

Both face the same primary objection from realist opponents: if everything is consciousness, why do different people perceive the same world? Both have sophisticated answers — Advaita via the doctrine of Brahman as the common ground; Yogācāra via the ālayavijñāna (store-consciousness) seeding consistent representations across individual mind-streams.

Advaita grounds its idealism in Brahman — a universal, unchanging, self-luminous consciousness that is the substratum of all appearances. Individual consciousness (jīva) is ultimately Brahman. The world is Brahman appearing.

Yogācāra refuses a universal ground. The ālayavijñāna (store-consciousness) is a stream of moments — impermanent, not a substance. There is no universal Brahman underlying individual mind-streams. Each sentient being has their own ālayavijñāna. What makes the world consistent across beings is not a shared ground but shared karmic seeds.

The deepest difference: for Advaita, consciousness is fundamentally one — Brahman — and the appearance of many individual consciousnesses is a further appearance within that one. For Yogācāra, consciousness is fundamentally multiple — there are as many mind-streams as there are sentient beings — and the consistency of the apparent world is explained by karmic causation across streams, not by a single underlying ground.

This generates different accounts of liberation. For Advaita, liberation is recognising that individual consciousness was always Brahman. For Yogācāra, liberation is the transformation of the ālayavijñāna at its base — the seeds of misperception no longer germinate.

Advaita: the individual self is an apparent individual within Brahman — ultimately identical to Brahman, apparently separate through avidyā.

Yogācāra: the individual is a stream of experiential moments arising from the ālayavijñāna. There is no self (anātman). Liberation transforms the ālayavijñāna rather than dissolving the individual into a universal ground.

Advaita: mokṣa — recognition of the identity of jīvātman and Brahman. The superimposition of individuality is removed.

Yogācāra: āśrayaparāvṛtti — the 'revolution at the base' of the store-consciousness. The habitual tendency to misperceive representations as external objects is uprooted. The result is described as the dharmakāya — the body of truth.

The two traditions are closer than they appear on the surface — both are forms of idealism, both deny external reality, both describe liberation as a recognition. But the difference is real: Advaita has a universal self; Yogācāra has no self at all. These generate genuinely different metaphysics of liberation, despite the surface resemblance.