Ephesians 1:5 he predestined us for adoption as sons through Jesus Christ, according to the purpose of his will,
Having predestined us -(Προορισας). As the doctrine of eternal predestination has produced much controversy in the Christian world, it may be necessary to examine the meaning of the term, that those who do use it may employ it according to the sense it has in the oracles of God. The word “predestinate” verb προοριζω, from προ, before, and ὁριζω, I define, finish, bound, or terminate, whence ὁρος, a boundary or limit, signifies to define beforehand, and circumscribe by certain bounds or limits; and is originally a geographical term, but applied also to anything concluded, or determined, or demonstrated. Here the word is used to point out God’s fixed purpose or predetermination to bestow on the Gentiles the blessing of the adoption of sons by Jesus Christ, which adoption had been before granted to the Jewish people; and without circumcision, or any other Mosaic rite, to admit the Gentiles to all the privileges of his Church and people.
And the apostle marks that all this was fore-determined by God, as he had fore-determined the bounds and precincts of the land which he gave them according to the promise made to their fathers; that the Jews had no reason to complain, for God had formed this purpose before he had given the law, or called them out of Egypt; (for it was before the foundation of the world, Eph_1:4); and that, therefore, the conduct of God in calling the Gentiles now – bringing them into his Church, and conferring on them the gifts and graces of the Holy Spirit, was in pursuance of his original design; and, if he did not do so, his eternal purposes could not be fulfilled; and that, as the Jews were taken to be his peculiar people, And as well with the gentile who had no merit of their own. They also were partakes of the promise made to Abraham centuries earlier. And all this by the will of God, for His Good pleasure.