1 Corinthians 6:18

“Flee fornication, etc.] As that which is hurtful, scandalous, and unbecoming Christians; avoid it, and all the occasions of it, that may lead unto it, and be incentives of it: every sin that a man doth is without the body not but that other sins are committed by the body, and by the members of it as instruments; they are generally committed by the abuse of other things that are without, and do not belong to the body; and so do not bring that hurt unto and reproach upon the body, as fornication does: but he that committeth fornication, sinneth against his own body; not meaning his wife, which is as his own body; but his proper natural body, which is not only the instrument by which this sin…”

“Flee--The only safety in such temptations is flight (Gen 39:12; Job 31:1). Every sin--The Greek is forcible. "Every sin whatsoever that a man doeth." Every other sin; even gluttony, drunkenness, and self-murder are "without," that is, comparatively external to the body (Mar 7:18; compare Pro 6:30-32). He certainly injures, but he does not alienate the body itself; the sin is not terminated in the body; he rather sins against the perishing accidents of the body (as the "belly," and the body's present temporary organization), and against the soul than against the body in its permanent essence, designed "for the Lord." "But" the fornicator alienates that body which is the Lord's, and makes it…”

“Flee fornication - A solemn command of God - as explicit as any that thundered from Mount Sinai. None can disregard it with impunity - none can violate it without being exposed to the awful vengeance of the Almighty. There is force and emphasis in the word “flee” φεύγατε pheugate. Man should escape from it; he should not stay to reason about it; to debate the matter; or even to contend with his propensities, and to try the strength of his virtue. There are some sins which a man can resist; some about which he can reason without danger of pollution. But this is a sin where a man is safe only when he flies; free from pollution only when he refuses to entertain a thought of it; secure when he…”

“Flee fornication - All unlawful commerce with women, with speed, with abhorrence, with all your might. Every sin that a man commits against his neighbour terminates upon an object out of himself, and does not so immediately pollute his body, though it does his soul. But he that committeth fornication, sinneth against his own body - Pollutes, dishonours, and degrades it to a level with brute beasts. 1 Corinthians 6:19”

“6:18-20 For Christians, the body is the temple of the Holy Spirit (see study note on 3:16-17; cp. 2 Cor 6:16). Sexual sin violates this sacred sanctuary and the divine presence. • You do not belong to yourself: Christians can no longer claim their bodies as their own, as they have been bought . . . with a high price, the blood of Christ (cp. 1 Cor 7:23; Rev 5:9), and every part of their lives has been claimed by Christ for God’s glory (see Rom 14:7-9; 2 Cor 5:14-15).”

“Flee: Gen 39:12-18; Pro 2:16-19, Pro 5:3-15, Pro 6:24-32, 7:5-23, Pro 7:24-27, Pro 9:16-18; Rom 6:12, Rom 6:13; Ti2 2:22; Heb 13:4; Pe1 2:11 sinneth: Rom 1:24; Th1 4:5 1 Corinthians 6:19”