The false prophet’s teaching does not emphasize the utter sinfulness of sin and the total inability of man to anything about his own salvation.  It often does not really believe in sin at all, and certainly does not emphasize its vile nature.  It does not say that we are all perfect; but it does suggest that sin is not serious.  Indeed, it does not like to talk about sin; it talks only about individual or particular sins.  It does not talk about the fallen, lost, and depraved.  It does not like to talk about the solidarity of the whole of mankind in sin, and the fact that we have ‘all sinned and fallen short of the glory of God.’  It does not emphasize this doctrine of the exceeding sinfulness of sin’ as you find it in the New Testament.  And it does not emphasize the fact that man is ‘dead in trespasses and sins’, and utterly helpless and hopeless.  It does not like that; it does not see the necessity of doing that. (Martin Lloyd-Jones, Studies in the Sermon on the Mount, Vol II, page 246).