1 Corinthians 10:16–17

The apostle is dealing with the question of idolatry. The Jews shared in the altar; the Gentiles drank the cup of demons. What we Christians share in is communion with the sacrifice of Christ. We are identified with that sacrifice, and we cannot be identified with the cup of demons too.

Here we are to understand blessing rising to God from His people. The phrase that follows, "which we bless", shows that the Spirit of God means blessing given by the worshippers, and not blessing given to them. The words also match the Jews' cup of blessing, which clearly meant blessing rising to God. The Passover service in the apostles' time included a Cup of Blessing. It was called that because those who took the cup said the words, "Blessed are You, Jehovah our God".

For us the cup is a "cup of blessing", a symbol of the blood of Christ. It reminds us of His death, when at the Cross He shed the blood that cleanses from all sin. For Him it was a cup of judgment. But the cup that brought judgment to Him secures blessing for us. For this cup we can bless, or give thanks. Blessing the cup here carries no thought of one person consecrating the bread and the wine, as corrupt Christendom imagines.

That is the cup for which we give thanks at the Lord's Supper. The cup comes first because we can only get right with God on the ground of redemption by blood. That is why the Spirit stresses the fact of death here, by putting the cup before the loaf.

The first appeal rests on the blood of Christ. That blood is the answer of divine grace to the deepest need of a soul that stands guilty before God and covered with defilement. Was this to be treated lightly? … Here he does not say "the blood" or "the body of the Lord". We find that in 1 Corinthians 11. Here it is Christ, because the matter is one of grace. "The Lord" brings in the idea of authority.

There are two expressions of fellowship here — fellowship with and fellowship of. We usually speak of fellowship with one another, more in the sense of 1 John 1:7. But here it is not communion with, but communion of. The words "communion" (verse 16), "partakers" (verse 18) and "fellowship" all stand for the same root word in the original, which gives the idea of sharing in common. … The fellowship, or communion, of the blood of Christ is the sharing in common with all God's children in all the value of His wonderful death.

There is no need, however, for fanciful ideas about the bread. Let us be clear that the material is bread, and that it stays bread. He said, "This is My body," using a figure of speech, as He often did. … When He said "This is My body," He gave the loaf a special meaning as His memorial.

Israel by natural descent ate of the altar, and by eating they identified themselves with it. In the same way, if you share the table of the Lord, you have a common part in it with others. Eating is not itself identity with the body, but the sign of it. You cannot share in Christ and in demons at the same time. This is a moral "cannot".

The bread which we break was nothing less than fellowship with the body of Christ. At the same time it set forth the close unity of His saints on earth. What could be more inconsistent than to own this truth in the breaking of bread, and then to disown it by feasting in idol temples?

The blood of Christ awakens the gravest thoughts in the Christian. The body of Christ speaks of the closest unity possible, since we, the many, are one loaf, one body, and we all partake of the one loaf. The bread does not become the body of Christ, nor is the body joined to it. It is the loaf that we break, and it is the one loaf of which we all partake. It stands for the one body of Christ; and if the loaf is that body, then we, the many, are that one loaf too.

Read that verse with care. It states that we, who partake of the cup and the loaf as we should, are one bread — or loaf — that is, one body. The sign of that fact is that we all partake of the one loaf. The loaf is the symbol of the holy body of our Lord, given up in death as a sacrifice for us all, and of that alone.

It has been said that we do not have the unity of the church shown in the one loaf, but only in our partaking of that one loaf (Christ). But when we remember that there were twelve loaves on the table in the tabernacle, and that these symbolised Israel's national unity presented before God in Christ, we can hardly fail to connect the unity of the church in Christ with what is represented in the one loaf.

At its simplest, the word communion means a common participation. Here it is the saints, as members of the one body, sharing together at the Lord's Table in what the blood and the body of Christ set forth. Eating or drinking implies identification with the thing eaten or drunk. So the apostle says, "Consider the people of Israel: are not those who eat the sacrifices participants in the altar?" That is, by eating what they had placed on the altar as a sacrifice, they became identified with the sacrifices.

In partaking of the "one bread", we set forth our identification with the one body. Christ is the Head of that body, and all believers are members of it. The "one bread" does not only mean that those who partake at any given time are one. It does not only mean that believers in one place are one. It sets forth the unity of the whole body, which includes every true believer.

So in partaking of the one loaf, the Christian who is taught by God owns his union with all true believers across the whole earth. Their ignorance, weakness, or Christ-dishonouring divisions do not change that. But even so, he can only have fellowship with those who seek to walk in obedience to the word, and apart from evident evil. The Holy Spirit of God would certainly never seek to keep outward unity at the cost of inward holiness.