If we are trying to make a difficult decision, once we have done our research, we should allow the subconscious to work on the problem while we sleep. This makes full use of our brain. This is why we are encouraged to sleep on a problem. Sometimes I hear a voice talking to me, usually in dreams and occasionally during the day. This information is useful and usually based on something I have been trying to work out. I am aware that this is a projection from my subconscious mind to the frontal lobes of my brain.
We all do this to some degree but interpret its source according to our beliefs. Confirmation bias enables us to create our own map of life according to our needs and wishes. It is almost impossible to convince someone that the messages they receive come from anywhere other than the source they claim.