Sanctus

We are told that the angels tell each other, “Holy, holy, holy, is the Lord . . . .”  I’ve heard it suggested that we too will spend part or all of our time (if there is time) in the hereafter talking about God, telling each other how holy He is.

To me that always seemed (at best) a great abstraction.  If we already know that God is holy, what’s the point of telling each other what we already know?