Commentaries:
What did Paul teach them that he calls "traditions" (verse 15)? The King James Study Bible says in a note regarding traditions which you were taught: ". . . refers to more than customs. In view here is the totality of the apostolic doctrine as it was given to them."
He is not referring to the rituals or ceremonies of the apostolic church. He is talking about keeping the commandments of God—about keeping the Sabbath and the holy days, about living the Christian way of life, and about salvation by grace through faith in Jesus Christ. I Thessalonians 2:14 says that the Thessalonians were "imitators of the churches of God which are in Judea in Christ Jesus." How were the Judeans conducting their Christian lives? They certainly did not think the law of God was done away.
John W. Ritenbaugh
The Covenants, Grace, and Law (Part Twenty)
Sanctification is just the opposite of apostasy. Apostasy means "to depart" from truth, from God. Sanctification, on the other hand, is becoming more attached to God until Christ's image is formed in us. There is a contrast, then, between those condemned and those who are going to receive salvation, who will be rescued because they love the truth.
John W. Ritenbaugh
A Place of Safety? (Part 4)
Other Forerunner Commentary entries containing 2 Thessalonians 2:14:
1 Corinthians 9:19-22