Not that I don't have a whole lot for respect for Keating. But on this one, I prefer to rely on Angelic salutations and Greek grammar.
The whole practice of communing with the saints is based on these realities
- We are members of the same Body
- We are all alive (they are not dead), and
- we need each other.
This is the Communion of Saints. HE is our communion. That's all in the Bible, my brother.
I think your problem here is not that you are unfamiliar with the relevant Scriptures. In fact, that In fact, I am guessing you could find the passages I'm referring to, faster than I could!
The problem is, that you have not become much acquainted with the exceedingly rich implications of these Scriptures. It's a truth of fathomless depth, that all of us billions of Christ-loving and Christ-believing people are actual, living members of the Mystical Body of Christ.
We are in vital, living, and needed contact with each other.
Even you and me, ealgeone.