I am a European philosophically convinced by Hindu metaphysics (more particularly by advaita vedanta in the tradition of Adi Shankara that I discovered via René Guénon). I say this to explain that I came to Hinduism by reason, not by faith in the Scriptures, so this argument of authority does not convince me on its own.
There is one thing I don't understand; why pray to gods, and believe that gods exist?
Not only do they seem not to exist in themselves, and that I see no reason other than blind faith to believe in them, but even in the idea that they exist they are only illusory forms of the Brahman who is impersonal, so prayer becomes even more useless. I have difficulty understanding how one can believe in Brahman from a "vedantine" point of view (with the identity of Being and Consciousness and impersonal non-dual reality) and believe in the gods and actually pray to them.
I hope I'm clear, thank you.
edit : I do not doubt the Brahman but precisely the mutiple and personal gods, I see no reason other than blind faith to believe in them, (I am not talking about Brahman, I repeat it, but about Ishvara, Shiva, Krishna etc), and that even if they exist from the vedantin point of view they are illusions of an impersonal reality so prayer is always useles, so this subject is not a duplication of the other one that talks about Brahman's existence