10:21 Ye cannot drink the cup of the Lord, and the cup of devils - You cannot have communion with both.

1 Corinthians 10:21 Parallel Commentaries

Communion with Christ and his People.
AN ADDRESS AT A COMMUNION SERVICE AT MENTONE. "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? For we being many are one bread, and one body: for we are all partakers of that one bread."--1 Cor. x. 16, 17. COMMUNION WITH CHRIST AND HIS PEOPLE. I WILL read you the text as it is given in the Revised Version: "The cup of blessing which we bless, is it not a communion of the blood of Christ?" …
Charles Hadden Spurgeon—Till He Come

The Rock of Ages
(Ninth Sunday after Trinity.) 1 Corinthians x. 4. They drank of that Spiritual Rock which followed them; and that Rock was Christ. St. Paul has been speaking to the Corinthians about the Holy Communion. In this text, St. Paul is warning the Corinthians about it. He says, 'You may be Christian men; you may have the means of grace; you may come to the Communion and use the means of grace; and yet you may become castaways.' St. Paul himself says, in the very verse before, 'I keep under my body, and …
Charles Kingsley—Town and Country Sermons

Heaven on Earth
1 COR. x. 31. "Whether ye eat, or drink, or whatsoever ye do, do all to the glory of God." This is a command from God, my friends, which well worth a few minutes' consideration this day;--well worth considering, because, though it was spoken eighteen hundred years ago, yet God has not changed since that time;--He is just as glorious as ever; and Christian men's relation to God has not changed since that time; they still live, and move, and have their being in God; they are still His children--His …
Charles Kingsley—Twenty-Five Village Sermons