신명기 32:11의 주석

כנשר יעיר קנו AS AN EAGLE STIRRETH UP ITS NEST — He guided them with mercy and pity like the eagle which is full of pity towards his young and does not enter its nest suddenly — before it beats and flaps with its wings above its young passing between tree and tree, between branch and branch, in order that its young may awake and have enough strength to receive it (Sifrei Devarim 314:1).

כנשר יעיר קנו, may it be His will that just as at Sinai it had been His intention to make you immortal, and He would have succeeded if the sin of the golden calf had not intervened, He will do so once more in the future, when Israel/Moses’ prayer in this respect will be granted. This is what Zecharyah 10,8 spoke about when he said: אשרקה להם ואקבצם כי פדיתים, “I will whistle to them and gather them, for I will redeem them.”

כנשר יעיר קנו, "He was like an eagle rousing its nest, etc." Our sages in the Sifri pursued their own path in interpreting this verse; we ourselves also pursue our own path based on Vayikra Rabbah 17,4 discussing the affliction of Tzoraat. As long as the Israelites serve the merciful judge (in a general way), G'd does not immediately afflict the persons but rather the קן, property, such as the houses of the Israelites. If this proves ineffectual, G'd affflicts the clothing, and only as a last resort does He afflict the body of the sinner. Moses uses the simile of the eagle to show that just as the eagle rouses its young first, so G'd rouses the children of man to warn that man has to put his spiritual house in order. Any afflictions are in keeping with the victim's ability to endure them. Compare Bereshit Rabbah 55,2 that G'd never subjects man to a trial which is beyond his capacity to survive intact spiritually.