Blainerb: What John and brother Moore have written below is the crux of what God meant when he told Joseph Smith that the Protestant ministers of the day taught doctrines of men, which had a form of Godliness, but denied the Power thereof. In other words, they denied the "greater revelation," or the possibility of "greater revelation" than that contained in the Bible.
This will turn to their ultimate condemnation, in the great hereafter, because God has all power--and is the same today, yesterday, and forever--including having the right and ability to give forth "greater revelation."
cd: Certainly not greater than what Christ has given- from the mouth of another?
