The Great Treatise on the Stages of the Path to Enlightenment (Lamrim Chenmo)

The major work of Tsongkhapa, founder of the Geluk school of Tibetan Buddhism, completed in 1402 at Reting monastery. It is a systematic guide to the whole Buddhist path, built on Atiśa's Lamp for the Path to Enlightenment and its scheme of three kinds of person. After chapters on how to teach and on relying on a spiritual teacher, it sets out practices for the person of small capacity, who seeks a good rebirth: reflection on death, the sufferings of the lower realms, refuge and karma. For the person of medium capacity, who seeks liberation, it covers the sufferings of saṃsāra and the training in ethics, concentration and wisdom. For the person of great capacity, it explains bodhicitta, the wish to awaken for the sake of all beings, and the six perfections. The last and most famous part treats calm abiding (śamatha) and insight (vipaśyanā), giving a detailed Madhyamaka account of emptiness that stresses identifying exactly what is negated.

It is the fullest map of the Buddhist path in the Tibetan tradition, and its section on insight is one of the most careful philosophical treatments of emptiness in any language.