For rebellion is as the sin of witchcraft, and stubbornness is as iniquity and idolatry. Because you have rejected the word of the LORD, he has also rejected you from being king.
All Commentaries on 1 Samuel 15:23 Go To 1 Samuel 15
Cassiodorus Senator
AD 585
This is the greatest fault under which humanity labors, that after sinning they take refuge in excuses rather than prostrate themselves with repentant confession. Clearly such wickedness is to be reckoned amongst the worst sins, for its true source also seems to occasion slower progress by the sinner towards repentance. As the first book of Kings [Samuel] has it: “It is like the sin of witchcraft to rebel, and like the crime of idolatry to refuse to obey.”