Still hiding his secret sin, David the king was saved, in no small part, by Nathan the preacher’s fearless proclamation, Thou art the man (2nd Samuel 12:7). So carefully and honestly had that connection been nurtured, that the prophet felt free to speak truth to his king, without fearing for his life.
Amnon knew that his lustful desire for his half-sister, Tamar, was illicit: apparently, he had successfully fought off that temptation and fallen sick. So far, so good. But Amnon had a friend … (2nd Samuel 13:3) That friend, Jonadab, persuaded him to give in to his urges and with that careless counsel pulled the thread that unraveled Amnon’s life.