From the Greek, meaning ‘choice’ or ‘thing chosen’, or an opinion. It came to be used (in the Greek) for a sect or a school of philosophy, and of the ‘sects’ of the Sadducees and the Pharisees in Acts 5: 17; 15: 5. It is used by Paul for a protest group in Corinth (1 Cor. 11: 19) and for a typical kind of divisive action in the community (Gal. 5: 20), where the word is on its way to its later designation of a deviationist group within Christianity. By the end of the 1st cent. Ignatius of Antioch termed theological error a ‘heresy’ and, in the later Church, heresy, as deliberate adherence to ‘false’ doctrine, was condemned as sinful.