the Heart Essence of the Great Siddha, the chief mind treasure of Jamyang Khyentse Wangpo focused on the teachings of the mahasiddha Tangtong Gyalpo, See also {thang stong rgyal po}; the Heart Essence of the Great Siddha; the chief mind treasure of Jamyang Khyentse Wangpo focused on the teachings of the mahasiddha Tangtong Gyalpo; See also {thang stong rgyal po}; {grub thob thugs thig} the Heart Essence of the Great Siddha; the chief mind treasure of Jamyang Khyentse Wangpo focused on the teachings of the mahasiddha Tangtong Gyalpo; See also {thang stong rgyal po}