30 For this reason many are weak and sick among you, and many sleep. 31 For if we would judge ourselves, we would not be judged. 32 But when we are judged, we are chastened by the Lord, that we may not be condemned with the world. (1 Corinthians 11:30–32, NKJV)
The spiritual condition of many of the Corinthian Christians was in jeopardy. The terms “weak,” “sick,” and “sleep” have spiritual (not physical) significance. These were without spiritual strength, some were spiritually ill, and some were already dead. (See John 11:11-13, where Jesus used “sleep” to mean Lazarus was dead.) We must judge our eating of the Lord’s supper in order to avoid such spiritual demise (which, by the way, shows Christians can indeed sin and be lost). This context shows we must judge our heart and our conduct in the Lord’s supper by using the Lord’s instructions about the supper (1 Cor. 11:23-26, 27-29). Such personal examination helps us avoid divine judgment, as well as condemnation with the world (v. 31, 32). Paul’s rebuke of their sin in this matter was the Lord’s discipline, to correct their error and preserve their souls. Eating the Lord’s supper is not a mindless ceremony. It is not a liturgical sacrament by which the mere partaking of it God grants sanctifying grace to the worshiper. It is a moment of solemn, proclamation and reverential remembrance of the body and blood of Jesus Christ. Christians who turn it into anything else expose themselves to condemnation, not glory.