The Kriya Yoga technique, anciently taught by Krishna to Arjuna and referred to in the Bhagavad Gita, is the supreme spiritual science of yoga meditation. Secreted during the materialistic ages, this indestructible yoga was revived for modern man by Mahavatar Babaji. Babaji himself ordained me to spread this holy science of God-union through the Self-Realization Fellowship organization I founded at his behest and that of my guru. - Paramahansa Yogananda.