Isaiah 66:10

We learn from the example of mothers, who surpass all charity by nourishing their children with love in their arms, the mercy of the Creator towards his creatures. Finally, wanting to show how much He loves and cares for those whom He has created, God asks, 'Can a woman forget her nursing child, that she should have no compassion on the son of her womb? Even these may forget, yet I will not forget you' (Isaiah 49:15). This sentiment is also expressed in the Gospel when the Lord speaks to Jerusalem, saying, 'How often would I have gathered your children together as a hen gathers her brood under her wings, and you would not' (Matthew 23:37). And in Deuteronomy, it is written: As an eagle protects its nest and desires its young, spreading its wings, it receives them and carries them on its shoulders (Deut. XXXII, 11). Those who have written about the nature of animals say that all beasts, and even beasts of burden, and cattle, and birds have an innate affection for their offspring, but the greatest love is that of eagles, which build their nests in high and inaccessible places to protect their young from the serpent. They also say that among its feathers is found a stone called amethyst, which surpasses all poisons. If this is true, the affection of God towards his creatures is rightly compared to that of the eagles, who protect their offspring with constant vigilance, so that the ancient dragon and serpent, the devil and Satan, may not approach the newly hatched chicks, and so that all the snares of their adversaries may be broken by the name of the stone that is laid in the foundations of Zion. This Jerusalem, in which the sons will find consolation in their mother's embrace and will kneel, is the same Jerusalem of which the Apostle writes: 'But the Jerusalem that is above is free, which is our mother' (Galatians 4:26).

(Verse 10.) Rejoice with Jerusalem, and be glad for her, all you who love her. Delight in her with joy, all you who mourn over her, so that you may nurse and be satisfied from her comforting breast, and drink deeply and enjoy the abundance of her glory. LXX: Rejoice, O Jerusalem, and gather together all you who love her. Delight in her with joy, all you who mourn over her, so that you may nurse and be filled from her comforting breast, and after you have nursed, be delighted by the entrance of her glory. The apostles are commanded, and the apostolic men, who love both Jerusalems, and the one that has fallen they mourn and lament, and the one that will rise again they eagerly await with all desire, so that they may rejoice with her and in her, the one that is built with living stones, which roll upon the earth, and in the likeness of the wheels of the Cherubim, they follow the preceding spirit: not in those who have been dissolved into eternal ashes. About which the Lord spoke: Amen, amen I say to you, not one stone will remain upon another, until all these things are accomplished (Matthew 24:2). Rejoice, He says, with joy, all you who mourn for her. As we have taught about Peter and Paul, the apostles, and all who were awaiting the redemption of Israel, in order to suckle and be filled with the breasts of her consolation. For it could not be that she who gave birth to a male and was a mother, lacked an abundance of milk for the raising of her people and infants, who were born together, so that she would offer them two breasts, not at all like before in Egypt, broken and lying down, but whole and standing in virgin beauty, of the old and new Instrument, to offer rational milk. About whom the bridegroom speaks to her: Your breasts are better than wine (Song of Solomon 1:1). These were the ones about whom it was specifically said: Blessed are those who mourn, for they will be comforted (Matthew 5:5). And it should be noted that those who are little children are in need of milk for consolation, and they are still in a mortal place. But those who have progressed from the milk of consolation to solid food will have abundant delights of truth and knowledge of all glory, which is called Ziz in Hebrew. For this reason, where in our and the Greek codices it is read μόνιος ἄγριος, that is, singular wild, in Hebrew it is written Ziz Sadai, which Aquila translated as…