I struggle with this channelling business but you do sense things though. Haven’t you ever experienced sensing/foreseeing something that in retrospect you had no reason to presume? I think remnants of energy can be perceived, particularly (guessing now) if in the vicinity of recent turbulence. (Get behind the wheel of a car someone has just driven very fast, you can feel it – weird phenomenon. You don't need to be especially "tuned in" as fas as I can tell.) When it is perceived I think the medium decides it must be messages from some other side (for me the concept doesn’t support any kind of rationale not based in fiction) as a means of possibly explaining it to him/herself and the rest of us. If the spiritual entity of a deceased person could be communicated with I would think their interests would have shifted a great deal from when they were encumbered with a body and bills to pay. I don’t know how interested they would be in the petty foibles of the living now that they’ve escaped our cupboard.