“Formerly, man lived in a three-dimensional universe where, from an earth he inhabited with his neighbors, he looked forth to heaven above and to hell below.  Forgetting God, man’s vision has lately been reduced to a single dimension; namely, that of his own mind.  Where can the soul go, now that a road block has been thrown up against every external outlet?  Like a city which has had all its outer ramparts seized, man must retreat inside himself.  As a body of water that is blocked turns back upon itself, collecting scum, refuse, and silt, so the modern soul (which has none of the goals or channels of the Christian) backs upon itself and in that choked condition collects all the sub-rational, instinctive, dark, unconscious sediment which would never have accumulated had there been the normal exits of normal times.  Man now finds that he is locked up within himself, his own prisoner.  Jailed by self, he now attempts to compensate for the loss of the three-dimensional universe of faith by analyzing his mind.”  Archbishop Fulton Sheen (Go To Heaven)