1 Corinthians 11:19

There must be also heresies] cp. Matthew 18:7, 'It must needs be that offences come,' i.e. owing to human weakness and sinfulness.

Heresies] RM 'factions': cp. Galatians 5:20. The word (lit. 'choice,' then 'chosen opinions,' or a party holding opinions of their own') is repeatedly used of the sects of the Jews. That they which are approved, etc.] i.e. these parties 'are a magnet attracting unsound and unsettled minds, and leaving genuine believers to stand out approved by their constancy' (Findlay).