This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
A large stretch of the Surangama Sutra is built around a single, deceptively simple question the Buddha puts to his disciple Ananda: where is your mind? Ananda offers one answer after another, inside the body, outside it, hidden in the sense organs, in between, nowhere in particular, and the Buddha methodically dismantles each proposal in turn, showing that mind cannot be pinned to any location a listener would naturally reach for. The exercise is not a trick question so much as a demonstration in real time of how readily the mind is mistaken for a thing sitting somewhere, when the sutra's whole argument is that it is not that kind of object at all.
The text's own history mirrors the question it asks about the mind: nothing about its origin sits where a reader would expect it to. No Sanskrit manuscript of the Surangama Sutra has ever surfaced, and the sole complete text is a Chinese translation whose own translator and transmission history scholars have debated since at least the Song dynasty, some defending it as a genuine, if now lost, Indian or Central Asian original and others arguing it was composed directly in Chinese and presented as translated work. The sutra survived and flourished in Chinese Buddhism regardless of how that question is finally settled, becoming one of the most recited texts in the Chan tradition specifically because its investigation into where mind is and is not spoke directly to Chan's own central concern with the nature of mind itself.