1 Thessalonians 3:3-5: For this is the will of God, your sanctification; that is, that you abstain from sexual immorality; 4 that each of you know how to possess his own vessel in sanctification and honor, 5 not in lustful passion, like the Gentiles who do not know God; (NASB)
For this is the will of God. This is doctrine of a general nature, from which, as from a fountain, he immediately deduces special admonitions. When he says that this is the will of God, he means that we have been called by God with this design. “For this end ye are Christians—this the gospel aims at—that ye may sanctify yourselves to God.” The meaning of the term sanctification we have already explained elsewhere in repeated instances—that renouncing the world, and clearing ourselves from the pollutions of the flesh, we offer ourselves to God as if in sacrifice, for nothing can with propriety be offered to Him, but what is pure and holy.
That ye abstain. This is one injunction, which he derives from the fountain of which he had immediately before made mention; for nothing is more opposed to holiness than the defilement of fornication, which pollutes the whole man. On this account he assigns the lust of concupiscence to the Gentiles, who know not God. “Where the knowledge of God reigns, lusts must be subdued.”
By the lust of concupiscence, he means all base lusts of the flesh, but, at the same time, by this manner of expression, he brands with dishonor all desires that allure us to pleasure and carnal delights, as in Romans 13:14, he bids us have no care for the flesh in respect of the lust thereof. For when men give indulgence to their appetites, there are no bounds to lasciviousness. Hence the only means of maintaining temperance is to bridle all lusts.
As for the expression, that every one of you may know to possess his vessel, some explain it as referring to a wife, as though it had been said, “Let husbands dwell with their wives in all chastity.” As, however, he addresses husbands and wives indiscriminately, there can be no doubt that he employs the term vessel to mean body. For every one has his body as a house, as it were, in which he dwells. He would, therefore, have us keep our body pure from all uncleanness.
And honor, that is, honorably, for the man that prostitutes his body to fornication, covers it with infamy and disgrace.