1. Even a slight change will spoil it

    One who understands and appreciates the disciplic succession is certainly advanced, and we should always be very careful to give full respect to those who have so carefully handled this Divine Fruit of transcendental knowledge before us. Even a slight change will spoil it. That is why I have always been so careful to give you only those things which I have heard from my Guru Maharaja.

    From Srila Prabhupada’s letter to Satsvarupa, Hansadutta — Vrndavana, India August 1967