Tong-Len is an essential part of Tibetan Buddhist Mind-Training known as Lojong, the key to what is called Bodhicitta or "Enlightened Heart." Tong-Len has been said by the Tibetan lamas to be the most powerful and easiest dharma technique to learn for Westerners. In this slim volume, the traditional form of Tong-Len is clearly presented, along with another version called Reaction Tong-Len, which can be used throughout the day in post-meditation, while we go on with our regular routines.