About the source: Hridayananda das Goswami
Hridayananda Dasa Goswami is a senior religious leader of the International Society for Krishna Consciousness and one of the most prominent disciples of A. C. Bhaktivedanta Swami Prabhupada. Hridayananda Goswami is an initiating guru within ISKCON and has served as a member of the Governing Body Commission. He has a Ph.D. in Sanskrit and Indian Studies from Harvard University, and is the author of numerous studies on Vaishnava philosophy. He's been described as one of the best preachers in ISKCON.