A commentary by the nineteenth-century Tibetan master Zhechen Gyaltsab on the Seven Essentials of Self-Mastery, a famous text by the twelfth-century Kadampa master Chekhawa Yeshe Dorje.This powerful introduction to the heart of Buddhist practice presents the Tong Len (unconditional giving and taking on the suffering of others) system of developing Bodhicitta, the mind of enlightenment.Commentaries by Tarthang Tulku on each of Zhechen Gyaltsab's thirty-four chapters bring these ancient teachings into modern life, illuminating the timeless blessings of the Bodhisattva path.