The following is extract from Letters from Sri Ramanasramam, a translation of Suri Nagamma's letters in Telugu.
A devotee who has been a regular visitor here for a long time came a week back with a copy of the Tamil book Thiruvaimozhi and began talking to Bhagavan about Vaishnava traditions. It seems he recently received Samasrayanam (initiation). When he said that, Bhagavan began relating his earlier experiences as follows:
“When I was on the hill, some Vaishnavaites used to come there to see me. There are, as you know, two sections amongst Vaishnavaites, Vadakalai and Thenkalai. I used to speak to these visitors in accordance with their respective traditions, as I lose nothing by doing so.
When, however, they thought that I was on their side and wanted me to have Samasrayanam, I declined. They believe that no one will be permitted into Vaikuntam (heaven) unless he is duly initiated."
My question is what is the basis for the claim of Vaishnavaites, who belong to Vadakalai or Thenkalai section and is duly initiated, that unless one duly initiated one cannot enter into Vaikuntam?
Answer may be provided giving reference to other than the literature of Vaishnavaites, who belong to Vadakalai or Thenkalai section.