Just to add to Terry's excellent analysis of the involvement of C Russell's involvement with Pyramidology .
Professor Charles Piazzi Smyth had a pyramid shaped monument placed as a tombstone as had Russell.
How far mens minds can go when they are subjected to their own ignorance and imagination.
Russell's association with the Freemasons and their ideological concept of the structural form of the pyramid,
with god at the top, must have really stirred up the imagination of Russell and his dispositional era theories.
From all of this fueled inspired imagination and ignorance a religion was spawn, the Jehovah's Witnesses.