Just ask him where in the bible does it say that God has a visible organization today.This will force to use only the bible and keep him away from the mind-twisting explanations of the WT.And Matt. 24:45-47 is not talking about a visible organization,it's a parable.If you look at the official jw website under beliefs,it does not list an existant visible organization.As well the latest book What Does the Bible Really Teach also says nothing about a visible organization.
Goldminer