Name of Gyalwa Longchenpa's autocommentary to the Mind at Rest (sems nyid ngal gso), one of the three treatises of the Trilogy of Rest (ngal gso skor gsum), a description of the entire path, up to and including the Great Perfection, which is expounded according to the scholarly method ("the great way of the panditas") and according to the experiential method of pith instruction ("the profound way of the yogis"). [TPQ, 2010]