Note 2 at 1 Cor. 11:19: The Greek word that was translated "heresies" here is "hairesis," meaning "a choice, i.e. (specifically) a party or (abstract) disunion." W.E. Vine says the dominating significance of this word in the New Testament is "sect" resulting from choice. This word was translated "sect" five times (Acts 5:17; 15:5; 24:5; 26:5; 28:22), "heresy" once (Acts 24:14), and "heresies" three times (here; Gal. 5:20; 2 Pet. 2:1).

Some who hold an extreme view of the sovereignty of God (see note 8 at Rom. 5:3, p. 769 and note 7 at Rom. 8:28, p. 801) have interpreted this verse in a way that makes God the author of this heresy for the purpose of showing His true followers. However, it is because God upholds man's freedom of choice (see note 2 at Rom. 11:9, p. 820) that heresies are unavoidable.

The Lord has not ordained that there be heresies in the church as a way of weeding out the false believers. God has given us freedom of choice. He doesn't control us involuntarily. Therefore, there will be (must be) heresies and they will always seduce those whose hearts are not right with God.