It also agree with talesin. I would add that our sub-conscious mind constantly attempts to communicate with the so call conscious part of our mind; more accurately called our frontal lobes.
When a solution to a problem pops into our awareness or we feel as though a voice is helping us, we can attribute this to a god, Jesus, zeus, demon, dead friend or insanity but it is just the normal activity of our whole mind.
Please don't tell Tammy I said this.