An earnest warning against immorality: V. 18. Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body. V. 19. What? Know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own? V. 20. For ye are bought with a price; therefore glorify God in your body and in your spirit, which are God's.
That we are one with the Lord in spirit urges the apostle to repeat his urgent admonition: Flee fornication. In the case of this sin it would be foolish to stand and attempt to give battle, for here "the strongest oath is straw against the fire in the blood." As in the case of Joseph, courageous flight is the only solution of the difficulty, Prov. 6, 28.
And let no one deceive himself with the excuse that he is harming no one by his indulgence in this sin: Every sin which a person commits is outside of the body, but he that commits fornication sins against his own body. The sins against all the other commandments of the Decalog have their aim outside of the body; if they involve the organs of the body, as in the case of intemperance, they affect and injure only the transient, perishable organs of the body, and require for their commission some means that are taken from without and are in themselves foreign to the body. But the sins against the Sixth Commandment involve violation of self, of the inmost mental desires and physical abilities; the entire body is contaminated and dishonored, not only in one sex, but in both, for the Christian religion knows no double standard.
To make the Corinthian Christians feel the weight of his argument, the apostle refers them to the well-known dignity which the bodies of the believers as such possess: Or do you not know that your body is a temple of the Holy Ghost in you, whom you have from God, and that you are not your own, your own masters? "What are all the other gifts altogether," says Luther, "besides this gift, that the Spirit of God Himself, the eternal God, comes down into our hearts, yea, into our bodies, and lives in us, governs, leads, and conducts us!"
Although Paul is addressing the entire congregation, he yet speaks of the body in the singular, in order to bring out once more the fact that they are all one in Christ Jesus. Each one for himself and all of them together are the temple of the Holy Ghost, who has deigned to make them His abode, to take up His dwelling-place in their hearts and in their bodies. And therefore they are no longer masters of their own bodies, to perform their own lusts and desires. According to the heathen idea, prostitution was a consecration of the body; according to the Christian idea, it is the filthiest desecration of the body. The Christians may no longer use their bodies for the gratification of their sinful passions, but are bound to employ them in doing the holy will of God.
And to this end St. Paul concludes with a powerful appeal: For bought you were at a price; then glorify God in your body! We Christians were bought, delivered, redeemed, from the power of sin and the devil, not with corruptible things, as silver and gold. The price of our redemption rather was of a nature to make us stand in adoring astonishment and praise in all eternity: with the precious blood of Christ, as of a Lamb without blemish and without spot, 1 Pet. 1, 18. 19. Through this redemption we have become Christ's very own and are to serve Him in everlasting righteousness, innocence, and blessedness.
That is the inference of the apostle: Glorify God in your body; let all the acts of all your organs and members be undertaken with the object of increasing His honor and glory, let your body be a temple wherein each man serves as a priest to the most high God in all chastity and decency.
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