"So far as your question about controversy amongst the disciples . . . that is a fact. But this controversy is not material. Just like in a national program, different political parties are sometimes in conflict and make propaganda against each other, but their central point is always service to the country. Similarly, amongst the disciples . . . there may be some controversy, but the central point is how to preach the mission of His Divine Grace. If the central point is fixed up then there is no harm in such controversy. Every individual being must have his opinion; that is the significance of individuality, but all such differences of opinions must coincide in Krishna. In the battlefield of Kuruksetra were Arjuna and Bhisma who were fighting with one another, and because Krishna was on the side of Arjuna, sometimes Bhisma pierced the body of Krishna also with arrows. But still they remained the greatest devotees of the Lord.'"
(Srila Prabhupada's Letter to Mandali Bhadra, July 28, 1969)