Spiritual blessings
3 Blessed be the God and Father of our Lord Jesus Christ, who has blessed us with every spiritual blessing in the heavenly places in Christ, 4 just as He chose us in Him before the foundation of the world, that we would be holy and blameless before Him. In love (Ephesians 1:3-4, NASB)
Commentary on Ephesians 1:3-4 by Matthew Henry 
Source
In general he blesses God for spiritual blessings, Ephesians 1:3, where he styles him the God and Father of our Lord Jesus Christ for, as Mediator, the Father was his God as God, and the second person in the blessed Trinity, God was his Father. It bespeaks the mystical union between Christ and believers, that the God and Father of our Lord Jesus Christ is their God and Father, and that in and through him. All blessings come from God as the Father of our Lord Jesus Christ. No good can be expected from a righteous and holy God to sinful creatures, but by his mediation. He hath blessed us with all spiritual blessings. Note, Spiritual blessings are the best blessings with which God blesses us, and for which we are to bless him. He blesses us by bestowing such things upon us as make us really blessed. We cannot thus bless God again but must do it by praising, and magnifying, and speaking well of him on that account. Those whom God blesses with some he blesses with all spiritual blessings to whom he gives Christ, he freely gives all these things. It is not so with temporal blessings some are favoured with health, and not with riches some with riches, and not with health, &c. But, where God blesses with spiritual blessings, he blesses with all. They are spiritual blessings in heavenly places that is, say some, in the church, distinguished from the world, and called out of it. Or it may be read, in heavenly things, such as come from heaven, and are designed to prepare men for it, and to secure their reception into it. We should hence learn to mind spiritual and heavenly things as the principal things, spiritual and heavenly blessings as the best blessings, with which we cannot be miserable and without which we cannot but be so. Set not your affections on things on the earth, but on those things which are above. These we are blessed with in Christ for, as all our services ascend to God through Christ, so all our blessings are conveyed to us in the same way, he being the Mediator between God and us.