Ephesians 1:3 - Wesley's Explanatory Notes

Blessed be the God and Father of our Lord Jesus Christ, who hath blessed us — God's blessing us is his bestowing all spiritual and heavenly blessings upon us. Our blessing God is the paying him our solemn and grateful acknowledgments, both on account of his own essential blessedness, and of the blessings which he bestows upon us. He is the God of our Lord Jesus Christ, as man and Mediator: he is his Father, primarily, with respect to his divine nature, as his only begotten Son; and, secondarily, with respect to his human nature, as that is personally united to the divine. With all spiritual blessings in heavenly things — With all manner of spiritual blessings, which are heavenly in their nature, original, and tendency, and shall be completed in heaven: far different from the external privileges of the Jews, and the earthly blessings they expected from the Messiah.