"St. Paul contrasts glossolalia, the indistinct and inarticulate “speaking in tongues”, with “speaking in gnosis”, which uses the signifying articulations of language to transmit knowledge, a doctrine, and, consequently, to “edify” the community (1 Cor., XIV, 6-19). Gnosis is both ineffable and interior, a spiritual state, as well as formulable and objective, i.e. a doctrinal corpus. From this point of view, it is transmissible and can be the object of a tradition. Let us go further. The specificity of gnosis lies precisely in the conjunction of these two aspects. True gnosis is neither an abstract theory, a vain conceptuality that is illusorily satisfied with its own formulations, nor a confused mysticism, easily entrenched in the incommunicable. We can understand the importance that this term had to take on in the eyes of the first Christians, and later, in the first Fathers of the Church. In it was formulated something irreplaceable and infinitely precious: the affirmation of a kind of “internal verification” of the doctrine externally revealed and believed, the possibility for “theology”31 to be something other than a simple rational exercise, and to reach an intellective and savory experience of dogmatic truth — in short: a sacred intellectuality."

https://sensuscatholicus.substack.com/p/gnosis-and-gnosticism-in-rene-guenon