1 Corinthians 11 v 18-19


1 Corinthians 11:18-19 
(18)  For first of all, when ye come together in the church, I hear that there be divisions among you; and I partly believe it. 
(19)  For there must be also heresies among you, that they which are approved may be made manifest among you. 


11:18-19. The church was divided at a celebration which was meant to express unity (cf. 10:17). If these divisions (schismata; 1:10; 12:25) were related to those noted earlier (1:10-4:21), then one factor contributing to those divisions is evident here, namely, economic differences in the church (11:21). 

Paul did not want to believe the report about their divisions (v. 18b), but he knew that sin was inevitable (cf. Luke 17:1) and would not pass unnoticed by God. God’s approval (dokimoi) resumed a point Paul had discussed earlier (1 Cor. 9:27-10:10), where he used in 9:27 the contrasting word “disqualified” (adokimos). 

In the whole nation of Israel, freed from bondage in Egypt and bound for the Promised Land of Canaan, only two of that vast company gained God’s approval and entered the land (cf. 10:5). Many in the Corinthian assembly did not have this approval, which His discipline on them demonstrated (cf. 11:30-32). If the Corinthians thought the ordinances of the Lord’s Supper and baptism somehow communicated magical protection to the participants (cf. 10:12; 15:24), Paul’s excoriation must have been doubly painful since their behavior at this rite was directly linked to their chastisement (11:30-32)—the very thing they sought to avoid. 

Excerpt from: 
Walvoord, J. F., Zuck, R. B., & Dallas Theological Seminary. (1983-c1985). 
The Bible Knowledge Commentary : An Exposition of the Scriptures. 
Wheaton, IL: Victor Books.