The Scripture however teaches us very differently, when it says that Christ "died for our sins and rose again for our justification," Rom. 4:25; and when it said, "Behold the Lamb of God, which taketh away the sin of the world!" John 1:29. Wherefore let the blessed Virgin hold her place of due honor, as the woman whom God adorned with that high privilege above all other women, that she as a virgin should bring forth the Son of God. This honor however ought by no means so to be bestowed upon her, as in any way to take from her Son, our Lord, the glory of our redemption and of our deliverance from sin and death.
Moreover, the peculiar expression of the holy Scripture in this passage is most carefully to be held and guarded by us, as affording a truly wonderful light which opens unto us the depth of the divine goodness, revealed to us in the present sacred text; where we are taught concerning that enmity which God put between the serpent and the woman; such an enmity that the Seed of the woman should crush the serpent with all his powers. This crushing, Satan perfectly understood at the time, and therefore it is that to this day he rages with so much hatred against our human nature. Adam and Eve on the contrary, raised up by the promise of this crushing, conceived the hope of their restoration in all its fulness. And being thus filled with faith they saw that their salvation would assuredly be God's peculiar care; seeing that God had expressly testified, that the male Seed of the woman should utterly defeat and crush this their enemy. For the words are divinely put together with a wonderful emphasis.
III. The divine expression here is, "I will put enmity between thy seed and her seed." As if God had said, Thou, Satan, by means of the woman didst attack and seduce the man that thou mightest by means of sin be the head and lord over them. I therefore in like manner will execute my secret purposes against thee by means of the very same instrument. I will take hold of the woman, and by her I will produce a Seed; and that Seed shall bruise thy head. Thou by means of sin didst corrupt and make subject to death the flesh of the human nature. I will produce from that same flesh such a man, who shall crush and utterly defeat both thee and all thy powers.
By these divine words therefore both the promise and the threat were expressed with the most perfect plainness. And yet they were most obscure. For they left the devil in such a state of doubt and suspense that he held under suspicion all the women which brought forth from that time, fearing lest they should give birth to this Seed; though one woman only was designed to be the mother of this blessed offspring. Therefore as the divine threatening was expressed in a general term, "her Seed," Satan was so mocked thereby that he feared this Seed from every woman who brought forth.
In the same proportion, on the other hand, the faith of all mankind was confirmed. For, from the hour in which the divine promise was made, all men expected that promised Seed, and comforted themselves against Satan. Hence it was that Eve, when she brought forth her first-born, Cain, hoped that she had now "gotten" that bruiser of the head of Satan. And though she was deceived in that hope, yet she saw that the promised Seed would assuredly at length be born at some time or other from her posterity. And thus, with respect to all mankind also, this promise was most clear and at the same time most obscure.
Isaiah threw some additional light upon this glorious promise when he said, "Behold, a virgin shall conceive and bear a son," Is. 7:14. For it was then made certain that this Seed would not be born from the union of a man and a woman. But the prophet added certain other particulars, by which he still involved his prophecy in obscurity. In such obscurity therefore this most clear promise still remained until Mary had brought forth her Son. Of this birth then angels themselves were witnesses; and after the angels the shepherds and the wise men; until this birth was proclaimed abroad by the apostles, throughout the whole world.
This obscurity therefore tended to increase the concern and suspense of Satan to the highest degree. As it had been said, "I will put enmity between thee and the woman;" so Satan suspected and held as his enemy every woman alike, who gave birth to a child from the time that word was spoken until Christ was revealed. On the other hand, with respect to man, this same obscurity increased and strengthened his faith. Though each woman saw that she was not the mother who gave birth to this Seed, yet they all believed and were fully assured that this Seed would be born from some other woman.
God having thus spoken individually or personally, if I may so express it, that very manner of expression tended most effectually to mock and rack Satan, and to console the godly and to raise them to faith and hope. Thus women continued to bring forth until the Flood; and afterwards also, until the time of Mary. But the seed of none of those women could truly be said to be the Seed of the woman, but might rather be said to have been the seed of the man. But that which was born from Mary was conceived of the Holy Ghost and was the true Seed of Mary, the appointed woman. This the other promises also testify, which were made to Abraham and to David; according to which promises Christ was called "the Son of Abraham" and "the Son of David."
The meaning of the original promise here given Isaiah first revealed, when he prophesied "that a virgin should conceive and bear a son," Is. 7:14. Afterwards, a clearer explanation and confirmation of it was made by the angel in the New Testament. Wherefore I doubt not that there were many saints under the Old Testament, who did not understand this mystery, but who nevertheless fully expected that Christ would be born into this world of a woman, and that he would be the deliverer of the human race; though they knew not what would be the particular manner and circumstances of his birth. With this general knowledge they were content and by this knowledge they were saved; even though they knew not the manner in which Christ would be conceived and born. For this knowledge was reserved for the New Testament to reveal, as by the clearer and brighter light. And it was set forth in the first age of the Church with a greater obscurity, purposely on account of Satan, whom God willed to be mocked and racked in this manner that he might thereby have less rest and be more filled with fear on every side.
Wherefore after this great original promise had been thus set forth generally in the beginning and had by degrees been more circumstantially particularized, and then confined to the seed of Abraham; and further restricted by means of the patriarch Jacob to a certain tribe, the tribe of Judah; after this the devil became unconcerned about other peoples and tribes, and persecuted this one line of generation with marvelous cruelties and stratagems; until about the time of Christ it had been reduced to the extremest poverty and had become a hopeless trunk-root, from which no one could hope for either fruit or leaves. And hence it is that the Scriptures term that line of succession a "stem" or bare root as it were of Jesse, Is. 11:1, signifying thereby a decaying trunk from which nothing whatever could be expected.