The Lankavatara Sutra is one of the foundational sutras of the Yogacara school of Mahayana Buddhism, composed in Sanskrit somewhere in the fourth century CE. The frame narrative places the Buddha on Mount Malaya in Lanka — present-day Sri Lanka — answering a long series of questions posed by the yaksha king Ravana, the bodhisattva Mahamati, and the Buddha’s own attendants. Through more than three hundred pages of dialogue and verse, the sutra develops the central Yogacara teaching: that what is taken for an external world is in fact a movement of mind, that the apparent boundary between perceiver and perceived is a construction of the eight consciousnesses, and that the recognition of this is itself the way through.
The sutra was a foundational text for the early Chan tradition. The first patriarch Bodhidharma, on the traditional account, brought a copy with him from India to China in the early sixth century, and the early Chan school knew itself for a time as the Lankavatara school (Lengqie zong). The doctrine of one mind, the central pointing in much of later Zen, has its philosophical articulation here.
The sutra is unusual in being relatively philosophical and systematic for a Mahayana text. It develops the doctrine of the eight consciousnesses — the five sense consciousnesses, the conceptualising mind-consciousness, the manas or self-consciousness that creates the sense of a separate I, and the alaya-vijnana or storehouse-consciousness in which all habitual seeds of past actions are deposited and from which they ripen. It develops the three natures analysis, distinguishing the imagined, the dependent, and the perfected aspects of any apparent thing. And it returns repeatedly, throughout, to the central recognition: the world is no more than mind, no more than what is seen.
Where to read
D. T. Suzuki’s 1932 English translation, The Lankavatara Sutra: A Mahayana Text, remains the standard scholarly version. It is in copyright (Suzuki died 1966) but circulates widely in digital form under fair-use compilation policies. Suzuki also wrote a companion volume, Studies in the Lankavatara Sutra (1930), which is the most useful book-length introduction.
A more recent translation by Red Pine, The Lankavatara Sutra: Translation and Commentary (2012), gives a contemporary English version with extensive commentary.
Because the standard translations are still in copyright, we have not ingested a particular version here. The Wikipedia article for the Lankavatara Sutra is a useful starting point for context and links to digital copies.