Mind Only, and a Sutra Set on an Island

The sutra is framed as a teaching the Buddha delivers to Ravana, the demon king of Lanka, and it argues at length for a doctrine usually called cittamatra, mind only, or vijnaptimatra, representation only: that what appears to be an external world encountered by the senses is in fact a construction of consciousness, with no object existing independently of the mind perceiving it. This teaching became foundational for the Yogacara school of Indian Mahayana philosophy, one of the two major philosophical systems, alongside Madhyamaka, that shaped later Buddhist thought across Asia.

Compared to the more systematically argued treatises Yogacara philosophers such as Vasubandhu later composed, the Lankavatara itself reads as dense and unsystematic, moving between topics without the orderly progression of a philosophical treatise, a quality that has made it a difficult text for translators and that produced several distinct Chinese and Tibetan translations differing noticeably in length, organization and even doctrinal emphasis from one another. The sutra also introduces the concept of the tathagatagarbha, the buddha nature latent within all beings, attempting to reconcile that teaching with its own thoroughgoing mind only doctrine, an integration later Yogacara philosophers continued to debate the precise terms of.