But we are bound to always give thanks to God for you, brothers loved by the Lord, because God chose you from the beginning for salvation through sanctification of the Spirit and belief in the truth;
Hagiasmos, defined as "consecration or purification" (Thayer 6-2-38), is translated "sanctification" in this verse; however, it can also be translated "holiness" as in Paul’s first letter: "For God hath not called us unto uncleanness, but unto holiness" (1 Thessalonians 4:7).