1 And since Adam was moulded from this earth to which we belong, the Scripture tells us that God said to him, “In the sweat of your face shall you eat your bread, until you turn again to the dust from whence you were taken.” If then, after death, our bodies return to any other substance, it follows that from it also they have their substance. But if it be into this very [earth], it is manifest that it was also from it that man's frame was created; as also the Lord clearly showed, when from this very substance He formed eyes for the man [to whom He gave sight]. And thus was the hand of God plainly shown forth, by which Adam was fashioned, and we too have been formed; and since there is one and the same Father, whose voice from the beginning even to the end is present with His handiwork, and the substance from which we were formed is plainly declared through the Gospel, we should therefore not seek after another Father besides Him, nor [look for] another substance from which we have been formed, besides what was mentioned beforehand, and shown forth by the Lord; nor another hand of God besides that which, from the beginning even to the end, forms us and prepares us for life, and is present with His handiwork, and perfects it after the image and likeness of God.
2. And then, again, this Word was manifested when the Word of God was made man, assimilating Himself to man, and man to Himself, so that by means of his resemblance to the Son, man might become precious to the Father. For in times long past, it was said that man was created after the image of God, but it was not [actually] shown; for the Word was as yet invisible, after whose image man was created, Wherefore also he did easily lose the similitude. When, however, the Word of God became flesh, He confirmed both these: for He both showed forth the image truly, since He became Himself what was His image; and He re-established the similitude after a sure manner, by assimilating man to the invisible Father through means of the visible Word.
3. And not by the aforesaid things alone has the Lord manifested Himself, but [He has done this] also by means of His passion. For doing away with [the effects of] that disobedience of man which had taken place at the beginning by the occasion of a tree, “He became obedient unto death, even the death of the cross;” rectifying that disobedience which had occurred by reason of a tree, through that obedience which was [wrought out] upon the tree [of the cross]. Now He would not have come to do away, by means of that same [image], the disobedience which had been incurred towards our Maker if He proclaimed another Father. But inasmuch as it was by these things that we disobeyed God, and did not give credit to His word, so was it also by these same that He brought in obedience and consent as respects His Word; by which things He clearly shows forth God Himself, whom indeed we had offended in the first Adam, when he did not perform His commandment. In the second Adam, however, we are reconciled, being made obedient even unto death. For we were debtors to none other but to Him whose commandment we had transgressed at the beginning.
Source: Adversus haereses (New Advent)