When one reads Srila Prabhupada's books we can see how Srila Prabhupada always presents his instructions and his orders in line with the statements of the scriptures and he always quotes the previous acaryas in support of his statements, and therefore we can see that his behavior is consistent with "guru, sadhu and sastra". So, similarly, in accepting direction from others one must be very careful to make sure that this person also represents "guru, sadhu and sastra". We must see that he is a servant of a vaishnava.
March 10, 1991, Kiev