It was compiled by the first Panchen Lama, Losang Chokyi Gyaltsen, as a preliminary practice for Tantric Mahamudra. The main practice is meditation on reliance upon our Spiritual Guide, but it also includes all the essential practices of the stages of the path (Lamrim) and training the mind (Lojong), as well as both the generation and completion stages of Highest Yoga Tantra. By relying upon our Spiritual Guide as one with Je Tsongkhapa, our compassion, spiritual power, and especially our wisdom will naturally increase. A complete commentary to this practice can be found in Great Treasury of Merit.