Three categories

Mañjushrimitra

Three categories or three classes (Tib. dé sum; sde gsum) - the three categories into which Mañjushrimitra divided the Dzogchen teachings he received from Garab Dorje:

1. the outer category of mind (semdé),
2. the inner category of space (longdé),
3. and the secret category of pith instructions (mengak dé).