Reading Peter Brown’s formative biography on Augustine (rev. 2000 edition). In it he makes this profound connection between the halt of evangelism and elitism in the Church:

There was one other split in the moral ideas of his hearers which Augustine could do nothing to heal: for it was a split within Christian ethics itself. The Christian communities had come increasingly to accept a dangerous degree of ‘moral specialization’: one life was left for the ‘perfect’, another for the average Christian. And it was just this widening gulf between an ascetic elite and a passive rank and file which brought the Christianization of the Roman world to a halt. (Peter Brown; Augustine of Hippo: A Biography; University of California, 2000; p. 245).

Could it be that many clergy are making such a dichotomy in their congregations when they fail to show their people how to read their Bible, how to obey rightly, how to die sacrificially as any other priest would?