Krsna and His representative, both of them are perfect because Krsna is perfect, there is no doubt, and one who speaks according to Krsna, he is also perfect. A human being or a living being is not expected to become as perfect as Krsna. That is not possible. Therefore, if a person sticks to the instruction of Krsna, does not make any addition and alteration, he is also perfect.

Srila Prabhupada — December 27, 1975