3. The grace of God is very manifest in the adoption of the chosen ones; the cause of which is, the good pleasure of the will of God; and the end of it, the glory of his grace (Eph. 1:5, 6). God, the adopter, stood not in any need of sons; he had a Son, an only begotten Son, a beloved Son, the dear Son of his love, who always pleased him, his Son and Heir; the adopted are altogether unworthy of such a favour, being “by nature children of wrath, as others”; and these men, and not angels, who are only servants in the family, to wait upon the children, the heirs of salvation, and minister unto them: and not all the race of men, only some, and these no better in themselves than others; and therefore their adoption cannot be ascribed to anything else but the free and distinguishing grace of God; and into which relation they were taken before time, in the everlasting covenant; and Christ was sent to open the way, that they might receive this blessing of grace, and which they do by faith, the gift of God; for faith does not make them, only manifests them to be the sons of God; which relation is the ground of their having the Spirit, faith, and every other grace (Gal. 4:4-6).
John Gill (1697 – 1771) A Body of Doctrinal Divinity Book 1, Chapter 13, The Grace of God