From "Sermon and Deeds of the Antichrist.
This quote, from a mid-19th Century sermon by John Henry Newman, concerns Profession without Practice. Newman wondered why Jesus would bother, during a speech before a large crowd, to first warn his disciples about hypocrisy:
"The Pharisees, it is true, said one thing and did another; but they were not aware that they were thus inconsistent; they deceived themselves as well as others. Indeed, it is not in human nature to deceive others for any long time, without in a measure deceiving ourselves also. And in most cases we contrive to deceive ourselves as much as we deceive others…"
To Newman, hypocrisy is:
"…not simply for a man to deceive others, knowing all the while that he is deceiving them, but to deceive himself and others at the same time."
Sermon 10. Profession without Practice, Parochial and Plain Sermons, Works of John Henry Newman, Newman Reader>>
Image: Detail from Sermon and Deeds of the Antichrist by Luca Signorelli, 1500.