Are You Not Invoking Demons?

In these cases, you know who you're talking to. If i'm talking to god, the creator of the universe, he knows that he's the one i'm addressing. And if i'm addressing saint michael or the virgin mary, they know that I'm talking to them, not a demon. But what if you hear back? You hear a voice or something? This is where it gets more interesting,. It may not be the person i was talking to that answers me back. That's why the new testament has instructions to test the spirits and see if what they say agrees with christian doctrine. So don't use mediums or seances. What about situations involving psychic