Out of the mouth of babes and infants have you ordained strength because of your enemies, that you might still the enemy and the avenger.
All Commentaries on Psalms 8:2 Go To Psalms 8
Augustine of Hippo
5. "Out of the mouth of babes and sucklings Thou hast made perfect praise, because of Thine enemies" (ver. 2). I cannot take babes and sucklings to be any other than those to whom the Apostle says, "As unto babes in Christ I have given you milk to drink, not meat." Who were meant by those who went before the Lord praising Him, of whom the Lord Himself used this testimony, when He answered the Jews who bade Him rebuke them, "Have ye not read, out of the mouth of babes and sucklings Thou hast made perfect praise?" Now with good reason He says not, Thou hast made, but, "Thou hast made perfect praise." For there are in the Churches also those who now no more drink milk, but eat meat: whom the same Apostle points out, saying, "We speak wisdom among them that are perfect;" but not by those only are the Churches perfected; for if there were only these, little consideration would be had of the human race. But consideration is had, when they too, who are not as yet capable of the knowledge of things spiritual and eternal, are nourished by the faith of the temporal history, which for our salvation after the Patriarchs and Prophets was administered by the most excellent Power and Wisdom of God, even in the Sacrament of the assumed Manhood, in which there is salvation for every one that believeth; to the end that moved by Its authority each one may obey Its precepts, whereby being purified and "rooted and grounded in love," he may be able to run with Saints, no more now a child in milk, but a young man in meat, "to comprehend the breadth, the length, the height, and depth, to know also the surpassing knowledge of the love of Christ."
6. "Out of the mouth of babes and sucklings Thou hast made perfect praise, because of Thine enemies." By enemies to this dispensation, which has been wrought through Jesus Christ and Him crucified, we ought generally to understand all who forbid belief in things unknown, and promise certain knowledge: as all heretics do, and they who in the superstition of the Gentiles are called philosophers. Not that the promise of knowledge is to be blamed; but because they deem the most healthful and necessary step of faith is to be neglected, by which we must needs ascend to something certain, which nothing but that which is eternal can be. Hence it appears that they do not possess even this knowledge, which in contempt of faith they promise; seeing that they know not so useful and necessary a step thereof. "Out of the mouth," then "of babes and sucklings Thou hast made perfect praise," Thou, our Lord, declaring first by the Apostle, "Except ye believe, ye shall not understand;" and saying by His own mouth, "Blessed are they that have not seen, and shall believe." "Because of the enemies:" against whom too that is said, "I confess to Thee, O Lord of heaven and earth, because Thou hast hid these things from the wise, and revealed them unto babes." "From the wise," he saith, not the really wise, but those who deem themselves such. "That Thou mayest destroy the enemy and the defender." Whom but the heretic? For he is both an enemy and a defender, who when he would assault the Christian faith, seems to defend it. Although the philosophers too of this world may be well taken as the enemies and defenders: forasmuch as the Son of God is the Power and Wisdom of God by which every one is enlightened who is made wise by the truth: of which they profess themselves to be lovers, whence too their name of philosophers; and therefore they seem to defend it, while they are its enemies, since they cease not to recommend noxious superstitions, that the elements of this world should be worshipped and revered.