2 Thessalonians 2:15 (NIV) So then, brothers and sisters, stand firm and hold fast to the teachings we passed on to you, whether by word of mouth or by letter. The previous verses have dealt with Satan inspired lawlessness. With this dreadful view of the future, Paul makes the vivid contrast by identifying those chosen of God. Paul starts off with the significant word “But” meaning in contrast with unbelievers.