A translation into English of a the Pan sgrub rnams kyi thugs bcud snying gi nyi ma, or The Sun of My Heart: A Hearty Elixer for Panditas and Siddhas, a unique Tibetan manuscript containing the commentaries of Vairochana Rakshita, who was active during the 8th century of our era, on the Tantras known as the Five Early Translations and the Tantra on the Miraculous Occurrence. This book will be of primary interest to those who study contemplative traditions and to practitioners of the Great Perfection tradition of Tibetan Buddhism. Scholars of the early transmission of Buddhism to Tibet will find this to be a basic resource. The original Tibetan text of this unique manuscript is included.