Anyone who is preaching devotion to God, he's a devotee of God. So he should never be blasphemed.
Preaching is the essence .
His Divine Grace A.C Bhaktivedanata Swami Prabhupada
Keep Chanting The Holy Name Of God
Hare Krishna Hare Krishna
Krishna Krishna Hare Hare
Hare Ram Hare Ram
Ram Ram Hare Hare
Preach the message of God Using This Material : vedabase.net/
Listen To Srila Prabhupada Vani : http://www.prabhupadavani.org/
