The cup of blessing which we bless, is it not the communion of the blood of Christ? The bread which we break, is it not the communion of the body of Christ? . . . You cannot drink the cup of the Lord and the cup of demons; you cannot partake of the Lord’s table and of the table of demons. 1 Corinthians 10:16, 21 NKJV 

Baptism into the body of Christ (1 Cor. 12:13) is not only a regeneration and integration (Titus 3:5), but it is also an initiation of participation of the many blessings of God (John 1:16; 2 Cor. 1:20).

In the New Testament Greek, the word for communion (koinonia) means partnership, participation, and social intercourse i.e., fellowship (1 Cor. 6:17). Taking Communion is a reminder of our daily partnership, participation and fellowship with the body and blood of Jesus Christ. But honest and true participation requires separation from all that is unclean, unholy things and evil people (Jer. 13:10).

God calls for separation: “Therefore come out from them and be separate, says the Lord. Touch no unclean thing, and I will receive you. I will be a Father to you, and you will be my sons and daughters, says the Lord Almighty” (2 Cor. 6:17-18).  However, separation has two sides: first, not touching the unclean and unholy things, but also, the believer separating himself to God (Rom. 12:1-2) Also, Jesus prayed in the Garden that those who believed would be in this world, but not of this world (John 17).

God’s promises, blessing and benefits are in the “cup of the Lord” which we drink and “the bread which we break.” Participation in these blessings and benefits demands a separation from all that is unclean, unholy things and evil people. You can’t have it both ways—you cannot drink the cup of the Lord and the cup of demons; you cannot partake of the Lord’s table and of the table of demons (Text). Eating at the Lord’s Table means communing with Christ and identifying with His death, and eating at the table of demons means identifying with Satan by participating and promoting evil activities.

Are you trying to lead two lives; following the crowd and the cloud of the Holy Spirit who baptized you into the body? You must separate in order to participate! (2 Tim. 2:19-21).