I Thessalonians 4:1-8 Sexual Purity.
Paul and his colleagues gave commands to the Thessalonians which they were walking in and thus pleasing God (vv. 1-2). Now he encourages them to abound in this “more and more.” This was their sanctification-the will of God. Of particular note to Paul was the issue of sexual fidelity (v. 3-4 Cf. Rom. 12:2; Eph. 26-27). There is an honourable way to conduct oneself in the area of sexuality, “not in passion of lust,” like those who do not know God (v. 5 Cf. Col. 3:5). Knowing God here is clearly more than simple information, to know God is to live a certain way based on what we know about God in a way that reflects a personal relationship with Him. It also concerns how we relate to each other-adultery is a defrauding of the spouses cheated (v. 6). God will avenge the guilty and unclean in this matter (II Th. 1:8). Rather, we are all called to holiness (v. 7 Lev. 11:44; Rom. 6:19). The Holy Spirit is given to us to live a sanctified life. To sin in this way is to reject God (v. 8).