We often think of the word “blessed” in the context of God doing something for an individual. However, in Paul’s opening comments to the “saints who are at Ephesus and who are faithful in Christ Jesus,” he says God should be blessed for all the things He has done (Ephesians 1:1, 3).
In his opening remarks, Paul is saying these people, collectively known as the church, should be thanking God for all the “spiritual blessings in the heavenly places in Christ.” Paul enumerates several things God has done for this church, which was purchased with the blood of Jesus. As one thinks about all these different things, every person, and especially Christians, should give thanks to God for what He did for the body of Christ, the church.