God, omnipotent and merciful, whose nature is goodness, whose will is power, whose work is mercy, foretold at the very beginning of the world, as soon as the devil’s malice had poisoned us with the venom of his envy, what were the remedies his compassion had foreordained for our healing. He bade the serpent know that there was to be a Child of the Woman, who should effectually crush the pride of his injurious head, signifying Christ to come in the flesh, that is, God and man, born of the Virgin, who should condemn by his undefiled birth the seducer of the human race.
CHRIST IN THE FLESH; GOD AND MAN, BORN OF THE VIRGIN
The devil rejoiced that he had so deceived man by his artifices as to make him lose the gifts of God, that he had stripped him of the privilege of immortality, had brought him under the hard sentence of death, and that he himself had found some sort of solace in his unhappiness, in that he had found a comrade in guilt. He thought also to bring it to pass that God, by a justly earned severity, should change his feelings towards man whom he had created in such honour. There was need, beloved brethren, that God who is unchangeable, whose will and loving-kindness are inseparable, should fulfil his original purpose of goodness by a mysterious dispensation, so that man, driven into crime by the wicked craft of the devil, should not perish and frustrate the plan of God.
MAN, DRIVEN INTO CRIME BY THE DEVIL, SHOULD NOT PERISH
When, therefore, beloved brethren, the fulness of time appointed for man’s redemption was come, our Lord Jesus Christ entered this lower world. He came down from his throne in heaven without withdrawing from the glory which he has equal with the Father, and was born by a new order, by a new birth: a new order because he who is invisible in his own nature became visible in ours; he who is incomprehensible, willed to be comprehended; he who existed before all time, began to live in time; the Lord of the universe veiled the dignity of his majesty, and assumed the form of a servant; the impassible God did not disdain to become man capable of suffering, nor the immortal God to lay himself under the laws of death.
– From: An Approved English Translation of the Breviarium Romanum, Burns & Oates, London, 1964