The Lord then is for the body, because in the Lord the body has a future opened to it and present connections and uses which prepare it for that future. It is the Spirit of Christ who is, within us, the earnest of that future, and who forms us for it, inclining us while in the body and by means of it to sow to the Spirit and thus to reap life everlasting. Without Christ we cannot have this Spirit, nor the spiritual body He forms. The only future of the body we dare to look at without a shudder is the future it has in the Lord. God has sent Christ to secure for the body redemption from the fate which naturally awaits it, and apart from Christ it has no outlook but the worst. The Lord is for the body, and as well might we try to sustain the body now without food as to have any endurable future for it without the Lord.
But if the body is thus closely united to Christ in its present use and in its destiny, if its proper function and fit development can only be realized by a true fellowship with Christ, then the inference is self-evident that it must be carefully guarded from such uses and impurities as involve rupture with Christ. "Know ye not that your bodies are the members of Christ? Shall I then take the members of Christ and make them the members of an harlot? God forbid." The Christian is one spirit with Christ. There is a real community of spiritual life between them. It is the spirit which possessed Christ which now possesses the Christian. He has the same aims, the same motives, the same view of life, the same hope, as his Lord. It is in Christ he seeks to live, and he has no stronger desire than to be used for His purposes. That Christ would use him as He used the members of His own body while on earth, that there might be the same direct influence and moving power of the Lord's Spirit, the same ready and instinctive response to the Lord's will, the same solidarity between himself and the Lord as between Christ's body and Christ's Spirit--this is the Christian's desire. To have his body a member of Christ--this is his happiness. To be one in will with Him who has brought by His own goodness the light of heaven into the darkness of earth, to learn to know Him and to love Him by serving Him and by measuring His love with all the needs of earth--this is his life. To be so united to Christ in all that is deepest in his nature that he knows he can never be separated from Him, but must go forward to the happy destiny which his Lord already enjoys--this is the Christian's joy; and it is made possible to every man.
Possible to every man is this personal union to Christ, but to be united thus in one Spirit to Christ and at the same time to be united to impurity is for ever impossible. To be one with Christ in spirit and at the same time to be one in body with what is spiritually defiled is impossible, and the very idea is monstrous. Devotedness to Christ is possible, but it is incompatible with any act which means that we become one in body with what is morally polluted. If the Christian is as truly a member of Christ's body as were the hands and eyes of the body He wore on earth, then the mind shrinks, as from blasphemy, from following out the thought of Paul. And if any frivolous Corinthian still objected that such acts went no deeper than the eating of food ceremonially unclean, that they belonged to the body that was to be destroyed, Paul says, It is not so; these acts are full of the deepest moral significance: they were intended by God to be _the expression of inward union_, and they have that significance whether you shut your eyes to it or not.