Musar sur Jérémie 2:2

The thirteenth: "From days of yore" - behold [this is] the trait that the Holy One, blessed be He, has with Israel when their merit and similar [to it] ends. What shall He do - behold, they are not proper in their own right? It is written (Jeremiah 2:2), "I remembered for you the kindness of your youth, your love as a bride" - the Holy One, blessed be He, actually remembers the days of the early ones, the love that He had from before, and has mercy upon Israel. And through this, He remembers for them all the commandments that they did from the day they were born and all of the good traits with which the Holy One, blessed be He, runs His world. And from all of them, He produces a special quality to have mercy for them. And behold, this trait includes all of the traits entirely, as they explained in the Idra (Zohar, Nasso, p. 134b).