Chasidut zu Schemuel II 5:2

Genesis 49,9., “Yehudah is like a lion’s whelp; you ‎have grown from merely capturing prey, my son.” ‎‎Rashi’s commentary on this verse draws attention to the ‎fact that in the first half Yehudah is described as ‎גור אריה‎, “an ‎immature lion”, (as in Samuel II,5,2 describing David, while King ‎Sha-ul was still alive, whereas later on when he was on the throne ‎he is described as ‎אריה‎, a fully mature lion).‎
We have explained repeatedly, that the principal purpose ‎of the Jewish people having been sent into exile is to “save” some ‎of the “sparks” that had descended from the “Shechinah” so ‎that they could return to their celestial habitat. [Compare ‎reference to this concept on pages 21-22. Ed.] As soon as ‎this purpose of the exile will have been accomplished, and, as a ‎result, evil will have been expunged from our regions, seeing that ‎had it not been for Adam’s sin, it would never have been possible ‎to feel “at home” on earth, the final redemption will follow in its ‎wake.