The body is a unit, though it is made up of many parts; and though all its parts are many, they form one body. So it is with Christ. . . . If one part suffers, every part suffers with it; if one part is honored, every part rejoices with it. — I Corinthians 12:12, 26
This body reality is quite profound. Think about it, if you or I are living in sin, as the “body,” then the whole body is impacted. The Corinthians were indeed living in sin, and consequently other ‘churchs’ were suffering the consequence. When a church, and individual members of it (v 27) are living in habitual sin, they are involved in idolatry, consumed with self. A consequence of this, is that there is no space to think or pray or meet the needs of others in the body who need it. When living like this, we are so busy with ourselves, we are not able to think nothing of ourselves (cf. Phil. 2:5–8); thus we are not able to pour ourselves out on the ‘sacrifice and faith of others’ — thus the body is hurt.
Next time you are tempted to sin, especially in areas that the enemy has topos or specific ‘place’ (foothold), remember Christ in you, the hope of glory. Remember what His glory (and thus ours by virtue of union with Him) is characterized by, and filled up with, the cross, and death to self. Walk in the power of His resurrection, by the Spirit, which mightily works within you. Yield to Christ’s life, in you, instead of the life that has been taken to the depths of the see (cf. Micah 7) . . . live above approach, if for nothing else, that you may experience the death of Christ, that you may experience His life, giving life to the mortal members of your body.
Of course it is good to remember that when we do sin, and we will (cf. I Jn 2:1-2), that we can run directly to the Father; and in this moment of brokeness, what was meant to destroy us can — by Christ’s reversal — be used redemptively for the body (cf. II Cor 7:9, 10). Not that this grace gives us license (see Rom. 5–6; Gal. 4:13; I Pet. 2:16), but instead freedom to actually benefit the body, instead of hurt it.