All I need is 'proof of wisdom'.
Then I consider signing up forthwith.
Your channeling need be twice my IQ or equal to my poetical skill or better than my story-telling finesse.
P.S. My IQ is very high and my metaphysical poetical skill is legendary and my story telling is great, when I am 'in the mood'.
In other words; if the spirits that speak through you cannot add to the store of usable human knowledge they need keep silent and listen instead.
