The Sutra of Perfect Enlightenment offered Chan Buddhism a doctrinally rich articulation of sudden enlightenment grounded in the teaching that all beings are originally perfectly enlightened and that ignorance is only a temporary illusion. By affirming inherent Buddha‑nature and the original purity of mind, it provided a scriptural foundation for Chan’s emphasis on “original mind” and “seeing one’s nature,” while simultaneously undercutting rigid dualities such as enlightenment versus delusion or samsara versus nirvana. This non‑dual vision allowed Chan to present awakening not as the acquisition of something new, but as the recognition of what has always been present yet obscured.

At the same time, the sutra does not reduce practice to a single instantaneous event; it outlines stages of contemplation and purification, and describes specific meditative approaches such as illusion‑like contemplation and unified calm‑insight. This structure helped Chan articulate a nuanced relationship between sudden awakening and ongoing cultivation, often expressed as sudden enlightenment followed by gradual practice. The tension between immediate realization and continued training could thus be held within a single framework, enabling different Chan lineages to stress either the sudden aspect, the post‑awakening cultivation, or their inseparability without abandoning a shared textual touchstone.

The sutra’s language of “perfect enlightenment” resonated deeply with Chan’s self‑understanding, encouraging the school to present itself as a complete and all‑inclusive path that directly expresses the Buddha’s intent. Its systematic deconstruction of attachment to views and its anti‑conceptual, non‑dual rhetoric also gave Chan masters a canonical basis for their often iconoclastic style, even as they appeared to stand “beyond words and letters.” Over time, the text became one of the most studied scriptures in Chan circles, entering into a vibrant commentarial tradition in dialogue with other influential works and helping to shape the mature doctrinal and meditative profile of Chinese Chan.