Rabbi Zakkai, according to a tradition preserved in Rabbi Nissim of Kairouan's tenth-century work Chibbur Yafeh meha-Yeshuah, was granted an unusually long life. His students, puzzled that no specific act of scholarly brilliance or prophetic miracle attached to his name, asked him directly. Rabbi, why were you granted long years?
He gave them a humble answer. Because I never once neglected to sanctify Shabbat with the blessing over wine. That was his whole reply. Not a career of brilliant innovations. Not a long list of saved lives. Just the weekly kiddush, Friday night after Friday night, without exception, for every Sabbath of his adult life.
The students pressed for details. Was there never a week you went without? Once, the Rabbi admitted. There was a week so poor that we had no money for wine at all. My mother, seeing that Shabbat was going to come without kiddush, quietly removed the cap from her own head, the cap that was almost her last remaining piece of dignity, and sold it in the market. With the coins she bought a bottle of wine. That Friday night I made kiddush as I always had.
Rabbi Zakkai added one more sentence, almost as a postscript. When my mother died, she left many casks of wine in her estate. Heaven had multiplied her single sacrifice into a cellar. The cap she had sold for one bottle had been replaced, in the divine accounting, by a lifetime's supply of wine for her son and his descendants.
This exemplum, preserved as number 408 in Moses Gaster's 1924 Exempla of the Rabbis, teaches two linked truths. The first is that kiddush on a Friday night is worth more than many more dramatic acts of piety. The second is that the mesirut nefesh, the self-sacrifice of a mother, is a currency heaven accepts in enormous multiples. Rabbi Zakkai lived a long life because his mother once sold her cap. The small, the weekly, the unnoticed mitzvah of a mother's quiet choice became, in the end, the foundation of a Rabbi's century.