1 Corinthians 10:21

An Understandable Version (2005 edition)

You cannot drink [both] the cup of the Lord and the cup of evil spirits [i.e., and still be acceptable to God]. You cannot share in [both] the Lord’s Table and the table of evil spirits [and still be acceptable to God].

Cross References

Matthew 6:24

No person can serve two masters, for he will either hate the one and love the other, or else he will cling to the one and look down on the other. You cannot serve God and material things [at the same time].

1 Corinthians 10:16

Does not the “cup of blessing,” which we bless, signify a fellowship with Christ’s [physical] blood? [Note: This was the cup used at the close of the Passover meal and was called this because of the prayer of thanksgiving offered for it. Paul refers to such a prayer in connection with its use in the Lord’s Supper]. Does not the bread which we break signify a fellowship with Christ’s [physical] body?

1 Corinthians 8:10

For if someone with a weak conscience sees you, who have [correct] knowledge [in this matter], eating in an idol’s temple, will he not be encouraged to eat food sacrificed to idols?