But these rash and ungrateful men are the very men whom the Son of God has come to save, by making himself man, and by taking on himself the chastisement deserved by them, in order to obtain pardon for them. And then, seeing that man from the wounds inflicted by sin continued very weak and powerless to resist the strength of his enemies, what did he do? From strong and almighty as he was, he became weak, and assumed to himself the bodily infirmities of man, in order to procure for man by His merits the strength of soul requisite to subdue the attacks of the flesh and of hell. And so, behold him made a little child, in need of milk to sustain his life, and so feeble that he cannot feed himself, that he cannot move himself.
--St. Alphonsus Liguori, The Incarnation, Birth and Infancy of Jesus Christ
