Magi is a channel. There are two main types of channels sub conscious and conscious, subconscious the channel leaves their body and allows a higher entity to come in and speak for them, the channel does not remember so the sessions have to be recorded , a conscious channel knows what is going on at all times and stay in their body and allows the higher entity to speak through them. Channels are different than mediums, as the entities that speak through a channel are not dead they have never physical. It is why you can not channel Lucifer.