Augustine on Matthew 23:37: “Our Lord says plainly, however, in the Gospel, when upbraiding the impious city: ‘How often would I have gathered thy children together, even as a hen gathereth her chickens under her wings, and ye would not!’ as if the will of God had been overcome by the will of men, and when the weakest stood in the way with their want of will, the will of the strongest could not be carried out. And where is that omnipotence which hath done all that it pleased on earth and in heaven, if God willed to gather together the children of Jerusalem, and did not accomplish it? Or rather, Jerusalem was not willing that her children should be gathered together, but even though she was unwilling, He gathered together as many of her children as He wished: for He does not will some things and do them, and will others and do them not; but ‘He hath done all that He pleased in heaven and in earth’ (The Enchiridion, xcvii).
