1 Corinthians 11:19

For there must be also heresies among you, that they which are approved may be made manifest among you.

Heresies - not merely 'schisms,' "divisions" (), which are 'recent dissensions through differences of opinion' (Augustine), but also "heresies" - i:e., 'schisms become inveterate:' 'sects' (Greek, ; ). At present there were dissensions at the love feasts; but Paul, remembering Jesus' words (; ; ; ), foresees "there must be (come) also" matured secessions of separatists. The "must be" arises not from fatalistic necessity, but from sin necessarily bearing its natural fruits, which he foresees. These are overruled by Providence to the probation of character of both godly and ungodly professors, and to the discipline of the former for glory. There may be schism without secession (; ; ). "Heresies" had not yet its technical sense, referring to doctrinal errors: its means confirmed schisms. Augustine's rule is a golden one: 'In doubtful questions, liberty; in essentials, unity; in all things, charity.'

That ... approved may be made manifest - through the disapproved (reprobates) becoming manifested (; ).