In the Qur'an there is reference to something called Mantiq-at-Tayr and this is usually translated/understood as "Bird Logic". Because the reference is to 'Solomon' and his declaration to people that he and his father David were "taught Mantiq at'Tayr'" by God. And there is a work by a world class "psychonaut" named Attar of Neishapoor who wrote a book called by the same name and translated as "Conference of the Birds". (Note 'Bird' also means 'flier'. Mantiq can also meen logic.)
So I am certain this refers to esoteric speech and the "birds" in question that had conversations with Solomon were "fliers" (as in practicing psychonaut) and the matter is related to -Godel- and limitations of discerning 'truth' via text.
There is a 'communion in conversation' that is never achieved in text.
[1] https://en.wikipedia.org/wiki/Plato%27s_unwritten_doctrines
[2] https://en.wikipedia.org/wiki/Eleusinian_Mysteries