1 Kings 13:18 - Ellicott's Commentary On The Whole Bible

An angel spake unto me. — The lie was gross, and ought to have been obvious to one who had received a plain command, and must have known that “God was not a man that He should lie, or the son of man that He should repent.” It was believed, no doubt, because it chimed in with some secret reluctance to obey, and, by obedience, to give up all reward and hospitality. Hence the belief was a self-deceit, and, as such, culpable. It is inexplicable that the condemnation which it drew down should have been thought strange by any who understands human nature, and knows the self-deceiving colour which our wish gives to our thought. (See the famous Sermon of Bishop Butler on “Self-deceit.”)