hi! I've once had a lucid dream where a bright "wise" light said all sorts of wise/enlightening clever things to me in the kindest and sweetest churus of voices you could imagine- however just as you I don't really remember what it actually said. That is because the brain has the ability to make you think something is there and is described in detail in my theory here

As such, Assuming I properly understood your description, you remembered maybe and the general gist of it as "wise speech".
Still, sounds quite enjoyable