筠州黃檗山斷際禪師傳法心要

A collection of Chan teachings that asserts a single original mind is identical with Buddhahood and that genuine awakening arises from direct, nonconceptual realization rather than accumulation of doctrines, rituals, or moral achievements. The text repeatedly criticizes attachment to forms and discriminative thought, advising immediate practice of no-mind and release of grasping. It distinguishes provisional pedagogies and the three vehicles from the one true vehicle that points directly to intrinsic purity, addresses sudden and gradual capacities among practitioners, and uses exhortation, metaphor, and exchanges to dissolve conceptual obstacles and reveal the ever-present mind-as-nature in all beings.