I think the thing with that is that because the potion has something to do with the whole theory that pictures can capture the soul, like have u eva heard about the whole thing where some religions think that a camera can take peoples souls away when ppl take a picture?
anyways on that theory i think that because of that potion and because of the hard work and love that someone puts into a painting that a part of someone ie. the subject goes into it therefore it can talk and give advice.
dunno just puting something in there