Unfortunately people who deny the doctrine of the Trinity also "(just) go dust off your copy of (The Bible)" and arrive at different conclusions believing themselves led by the Holy Ghost. Therefore it is sometimes useful to expound on the Sacred Scriptures, Frank Sheed does a bang up job of doing exactly that.
I'm sorry you didn't gain any insight into what Sheed called "the inner, the innermost, life of God, His profoundest secret" from the excerpt I posted. His grasp on the subject is so much greater than mine, I can't imagine what it must be like to tower over him. Good for you, but it must be dreadful having to interact with people who think Sheed was profound. I think it must be something like the way I feel after 10 straight hours with my younger children: "OK, this was fun but my brain is melting down find me some grownups."
Joey Smith thought he towered over not only you and the Bible but also Frank Sheed when it comes to knowing better than the Bible teaches about the attributes of God...
You might complain to the mormons...