St. John 1: 12:  But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name

“Therefore we mount up unto dignity above our nature for Christ’s sake, and we too shall be sons of God, not like Him in exactitude, but by grace in imitation of Him. For He is Very Son, existing from the Father; we adopted by His kindness, through grace receiving I have said, Ye are gods and all of you are children of the Most High (Ps 82:6). For the created and subject nature is called to what is above nature by the mere nod and will of the Father; but the Son and God and Lord will not possess this being God and Son, by the will of God the Father, nor in that He wills it only, but beaming forth of the Very Essence of the Father, He receives to Himself by nature what is Its own Good. And again He is clearly seen to be Very Son, proved by comparison with ourselves. For since that which is by Nature has another mode of being from that which is by adoption, and that which is in truth from that which is by imitation, and we are called sons of God by adoption and imitation: hence He is Son by Nature and in truth, to Whom we made sons too are compared gaining the good by grace instead of by natural endowments.”

St, Cyril of Alexandaria, Commentary on the Gospel According to St. John (Vol. 1, 1874) pp. 104-5.