On the individual level, we have the teaching of Rabbi Abahu, who said, 'Where baalei teshuvah stand, people who have never sinned cannot stand!" (Berachot 34b). One who has been broken, so to speak, and then put himself back together again has proven his strength in a way that cannot be claimed by one who has not been put to the same test.
For the nation at large, the antifragile nature of Jews is illustrated by Vehi She'amda in the Haggadah:
And it is this that has stood for our Forefathers and us. For not just one enemy has stood against us to wipe us out. But in every generation there have been those who have stood against us to wipe us out, and the Holy One Blessed Be He saves us from their hands.
What is this in the passage? To put it in grammatical terms, it is a pronoun with no…