“Blessed be the God and Father of our Lord Jesus Christ, who hath blessed us with all spiritual blessing in heavenly places in Christ: according as He hath chosen us in Him before the foundation of the world, that we should be holy and without blame before Him in love.”-Ephesians 1:3-4
It should be our life to bless Him who gave us our life. It should be our delight to bless Him whom give us all our delights. So says the text, and so let us do: “Blessed be the God and Father of our Lord Jesus Christ.”
But how can we bless God? Without doubt the less is blessed of the Greater. Can the Greater be blessed by the less? Yes, but it must be in a modified sense. God blesses us with all spiritual blessings; but we cannot give Him any blessings. He needs nothing at our hand; and if He did, we could not give it. “If I were hungry,” saith the Lord, “I would not tell thee: for the world is Mine, and the fulness thereof.” God has an all-sufficiency within Himself and can never be thought of as dependent upon His creatures, or as receiving anything form His creatures which He needs to receive. He is infinitely blessed already; we cannot add to His blessedness. When He blesses us, He gives us a blessedness that we never had before; but when we bless Him, we cannot by one iota increase His absolutely infinite perfectness. David said to the Lord, “My goodness extendeth not to Thee.” This was as if he had said, Let me be as holy, as devout, and as earnest as I may, I can do nothing for Thee; Thou art too high, too holy, too great for me to be really able to bless Thee in the sense which Thou dost bless me. How, then, do we bless God? We say with David, “Bless the Lord, O my soul,” and we say with Paul, “Blessed be the God and Father of our Lord Jesus Christ.” We can bless God by praising him, extolling him, desiring all honour for him, ascribing all good to him, magnifying and lauding his holy name. Well, we will do that. Sit still, if you will, and let your heart be silent unto God; for no language can ever express the gratitude that, I trust, we feel to him who has blessed us with all spiritual blessings in Christ Jesus. ~ C.H. Spurgeon
https://www.blueletterbible.org/comm/spurgeon_charles/sermons/2266.cfm