The term “Arsa-Prayoga” means we should not correct the transcendental mistakes sometimes made by the acaryas. We can only correct if the acarya explicitly orders us to do so. And even then we should be very cautious and reluctant.
What does arsha-prayoga mean?
If one is too big, there is no mistake. Arsa-prayoga means there may be discrepancies but it is all right. Just like Shakespeare, sometimes there are odd usages of language, but he is accepted as authority. I have explained all these things in my Preface to First Canto. (Letter to Mandali Bhadra, Jaipur 20 January, 1972)