The Order of Theology: The Origins of the Father

Low-key doctrine predates even the Pre-Secratics. We find it in Justin Martyr and apologists of the first and second century. The son receives from the father both his personhood and his essence, because he is the direct icon and image of the father's nature. But that's because persons act, not natures, natures exist in the mode of the persons who have those natures to act.