Prayer is not open two-way communication nor a gradual increase of understanding.
Though it would be well within his power, God never does something even as simple as replying to a prayer in an actual, audible voice.
The believer sends their prayers into the darkness, usually to be answered by silence, occasionally receiving in response a hazy feeling “within their heart” so to speak, then they thereafter spend their time looking for signs and trying to figure out if whatever subsequently happens is an answer to their prayer because God doesn't tell them if it is - they have to figure it out for themselves.
Human beings may talk to God, but God never talks back, except, so the believers say, in subjective feelings and vague sensations that possess all the explanatory clarity of a Magic 8-Ball.