But we are bound to give thanks to God always for you, brethren beloved by the Lord, because God from the beginning chose you for salvation through sanctification by the Spirit and belief in the truth (2 Thessalonians 2:13, NKJV)
Paul felt a moral obligation to always thank God for his brethren. His reasons for giving thanks for them gives us guidance for being thankful for one another. Paul was thankful for them because they were loved by the Lord. Let us be thankful for our brethren because they share in God’s love. Paul was thankful because his brethren were the recipients of God’s eternal purpose of salvation. God chose to save sinners in Christ before the world began (Ephesians 1:4). His plan of “sanctification by the Spirit and belief in the truth” is fulfilled in each person who believes and obeys the gospel (Mark 16:15-16; Acts 10:34-35). Because Christians share in salvation it fills our hearts with thankful prayers as we meditate on the rich blessings of God’s eternal love.