Luke 7:31

The Jewish generation is compared to children, because formerly they had prophets for their teachers, of whom it is said, Out of the mouths of babes and sucklings hast thou perfected praise.

We therefore also, as I said, must closely examine with the discerning eye of the mind whatever is done, and search into the nature of actions, that so we may approve of that which is without blame, while we reject that which is counterfeit. But if, making no distinctions, we run the risk of passing an evil sentence upon things highly praiseworthy: and of deeming that which is evil fit for commendation and applause, the prophet's words will apply to us: "Woe unto them that call evil good, and good evil: who call bitter sweet, and sweet bitter: who put light for darkness, and darkness for light." Such was the character of the Israelites, and especially of those whose lot it was to be their chiefs, the Scribes namely and Pharisees: of whom Christ said, "To what shall I liken the men of this generation? and so on."

To what, then, shall I compare the men of this generation, and what are they like? They are like children sitting in the marketplace, calling to one another and saying: We played the flute for you, and you did not dance. We wailed, and you did not weep. The generation of the Jews is compared to children sitting in the marketplace because they used to receive the prophets as teachers. Of whom it is said: Out of the mouth of infants and nursing babies, you have perfected praise (Psalm VIII). And elsewhere, The unfolding of your words gives light; it imparts understanding to the simple (Psalm CXVIII), that is, to the humble in spirit. The Lord's marketplace or the synagogue, or even Jerusalem itself is where the laws of heavenly precepts were established. Where these children, according to Matthew, spoke to their equals, because they used to reproach their people daily with their own voices, they would not listen to the Psalms, first of David, nor after being corrected by the reproaches of the prophets. Whenever victory over the enemy was foretold or commemorated, they did not rise to the works of virtue. For by the word of dance is not meant the bodily gyrations of actors with swaying movements but the devotion of a zealous heart and the piety of agile members. Whenever the prophecies of calamities caused by future or present enemies resounded, and yet the listeners did not care to take refuge in remedies for penitence. The Psalmist sings: Shout with joy to God our helper, rejoice to the God of Jacob, take up a psalm, and bring the tambourine (Psalm LXXX), and so forth. But what follows? My people did not listen to my voice, and Israel did not attend to me (Ibid.). The prophet cries out: Thus says the Lord: Turn to me with all your heart, in fasting, in weeping, and in mourning, and rend your hearts and not your garments (Joel II). And again: My belly, my belly! I writhe in pain. The heart of my thoughts troubles me. I will not remain silent, for my soul has heard the sound of the trumpet, the alarm of war (Jeremiah IV). And a little later: For my people are foolish, they have not known me; they are senseless children, without understanding (Ibid.).