1 Paul, an apostle of Christ Jesus by the will of God,

To God’s holy people in Ephesus,[fn] the faithful in Christ Jesus:

2 Grace and peace to you from God our Father and the Lord Jesus Christ.

Praise for Spiritual Blessings in Christ

3 Praise be to the God and Father of our Lord Jesus Christ, who has blessed us in the heavenly realms with every spiritual blessing in Christ. 4 For he chose us in him before the creation of the world to be holy and blameless in his sight. In love 5 he[fn] predestined us for adoption to sonship[fn] through Jesus Christ, in accordance with his pleasure and will— 

For deeper study: David Guzik Commentary