1 Corinthians 10:21,22 - Ellicott's Commentary On The Whole Bible

Ye cannot... — Here follows the special reason why the Apostle desires them not to partake of the wine poured forth in libation to devils, or the table on which meat sacrificed to these devils was spread out as food. Such would deprive them of their participation in the cup of the Lord and the table on which the Lord’s Supper was placed. Of course the impossibility was moral, not physical. So the Apostle adds the warning question, Do you in fact do so? Do you do that which is morally impossible, and so provoke the jealousy of our jealous God, who will have no divided allegiance? Surely we are not stronger than He? To such a question there can be but one answer. These words, which are the climax of the argument, are naturally suggested by the passage in Deuteronomy (Deuteronomy 32:15-18), which was evidently in the Apostle’s mind all through this argument, containing as it does the striking words, “Rock of his salvation.” “They sacrifice unto devils and not to God,” and “they provoked Him to jealousy.”