Within Korean Seon, the Sutra of Perfect Enlightenment is regarded as a foundational teaching text that articulates the nature of Buddha‑nature and enlightenment. It stands alongside works such as the Platform Sutra and the Diamond Sutra as a core scriptural source for understanding the inherently enlightened nature of all beings and the non‑dual mind that Seon practice seeks to realize. In this way, it offers a doctrinal framework for themes such as original enlightenment, the illusory character of phenomena, and the non‑duality of samsara and nirvana. These teachings provide the philosophical ground on which Seon’s emphasis on sudden realization and direct insight into mind is built.

At the same time, the sutra functions as a bridge between doctrine and practice. Its explanations of how contemplative inquiry reveals one’s original enlightened nature give practical orientation to meditation, including the styles of inquiry and awareness that characterize Seon. By clarifying how delusion and awakening relate to the same Buddha‑nature, it supports the Seon understanding that enlightenment is not something newly acquired but something recognized. In this sense, it does not merely describe enlightenment in abstract terms, but illuminates how meditative practice and doctrinal insight mutually reinforce one another.

The Sutra of Perfect Enlightenment also holds a concrete place within the institutional life of Korean Seon. It is part of the essential monastic curriculum, studied systematically in monasteries as a key text for grasping the relationship between meditation and inherent enlightenment. Seon masters draw on it in formal Dharma talks and public lectures, using its rich metaphors and arguments to clarify the nature of mind, emptiness, and non‑duality for both monastics and lay followers. Portions of the text are recited in ritual contexts, and its teachings inform the way Dharma is transmitted and explained within the lineage.

Because of this multifaceted role, the sutra serves as both doctrinal anchor and living guide. It provides the conceptual language through which Seon articulates its vision of sudden enlightenment, while simultaneously shaping how practitioners are instructed to look directly into their own minds. Its images, arguments, and subtle distinctions are repeatedly mined by teachers as a touchstone for expressing the heart of Seon: that the mind which seeks awakening is, in its deepest nature, already perfectly enlightened.