Swami Shantananda, a Siddha Yoga monk and teacher, comments on a key text of Kashmir Shaivism called Pratyabhijna-hrdayam ("The Heart of Recognition"), written by the sage Kshemaraja in the eleventh century. The text, consisting of twenty sūtras (aphorisms), is directly relevant to Siddha Yoga students since Siddha Yoga philosophy is imbued with the fundamental nondual teachings of Kashmir Shaivism. Swami Shantananda's commentaries, including personal observations and contemplation techniques, help the reader assimilate and put into action the profound teachings imparted by this classic scripture