i believe there IS communication going on for sure, but i like to think of it in a very basic, non-fantastical way.
the moment psilo hits your brain you notice the feeling that it's trying to help you see. by it latching on to your brain (receptors) and giving you a chemical that responds very well with your neurons, it enables your brain to be much more receptive, especially to very minute details in reality, and experience things at a much faster "frame rate" giving you the ability to reflect on many many more ideas than you normally could. there is a realization, then one see's the value of the medicine. one's imagination fills in the rest, hence the term "psychedelic".
that's how i like to think of it for right now