It is not like an optional constant, but in devotional service the idea, ” Gopī-bhartur pada-kamalayor dāsa-dāsa-dāsānudāsaḥ. ” being the servant of the servant of the servant of the Lord is essential “gurum evābhigacchet” (Mundaka Upannishad 1.2.12). Must have…. Must be serving a devotee of the Lord, Must be serving through the disciplic succession or guru parampara . So it says one should seek a pure devotee, a servant of the Lord, and engage himself in the service of such a servant. The more one becomes the servant of the servant; the more one becomes perfect.
His Holiness Jayapataka Swami Maharaj
1986, 30 October, SB class @ New Talavan, USA