Legacy & Influence

Few books outside the Bible and the Talmud have shaped daily Jewish life as deeply as Rabbi Yosef Karo’s. Almost every observant Jew in the world today — Sephardi or Ashkenazi, in Jerusalem, New York or Buenos Aires — follows rulings that pass through his hands.

Bringing order after the exile

When Karo began the Beit Yosef, the Jewish world was in upheaval. The exiles from Spain and Portugal had scattered across the Mediterranean, each community with its own customs, and the great medieval authorities often disagreed. Karo set out to trace every law of the Tur back to its sources in the Talmud, gather the opinions of the authorities after it, and decide between them. As his rule of decision he took the three pillars of halachah — the Rif, the Rambam and the Rosh — and followed the majority among them. It was a method anyone could check, and it gave a scattered people one road through the law.

The “Set Table” and its tablecloth

The Shulchan Aruch distilled the Beit Yosef into clear rulings arranged for daily use — a table, as its name says, set and ready. Printing gave it wings: within a few years copies were in every Jewish centre. Rabbi Moshe Isserles in Kraków, who had been writing his own commentary on the Tur, added glosses recording where Ashkenazi custom differs. He called them HaMapah, “the Tablecloth,” to be spread over Karo’s table. Printed together, the two became the shared code of the whole Jewish people — one text, read by Sephardim and Ashkenazim alike, each knowing where their paths part.

Around them grew the great commentaries that every rabbi studies: the Shach and the Taz, the Magen Avraham, and centuries later the Mishnah Berurah of the Chafetz Chaim and, in the Sephardi world, the Kaf HaChaim and the works of Rabbi Ovadia Yosef. Rabbinic ordination exams are built around it. The phrase “it says in the Shulchan Aruch” is part of everyday Jewish speech.

Maran: the master of the Sephardi world

For Sephardi and Eastern communities, Karo is Maran, the master whose rulings were accepted as binding. In modern Israel, Rabbi Ovadia Yosef built much of his life’s work on the principle that “we have accepted the rulings of Maran” — restoring the Shulchan Aruch to the centre of Sephardi law and pride.

The Rambam made whole

Maimonides wrote his Mishneh Torah without citing his sources. Karo’s Kesef Mishneh found them, explained his reasoning, and defended him against the critiques of the Raavad. It has been printed beside the Mishneh Torah in almost every edition since, so that every student of the Rambam studies with Karo at his side.

The lawyer and the mystic

The same man who wrote the most precise code of Jewish law kept, for some fifty years, a mystical diary of the words of a heavenly teacher. The Maggid Meisharim shows a soul driven to holiness — urged to sleep little, eat simply, and never stop learning. Scholars have called him “lawyer and mystic”; tradition sees no contradiction at all. In Karo, as in Tzfat itself, the revealed Torah and the hidden were two sides of one service of God.

Shavuot night

The custom of staying awake to learn through the night of Shavuot — the Tikkun Leil Shavuot, now kept in synagogues everywhere — has its earliest recorded observance in the vigil of Karo, Alkabetz and their friends. Alkabetz’s account, preserved by the Shelah HaKadosh, carried the practice across the Jewish world.

Tzfat, the city of sages

Karo’s court made Tzfat the legal capital of the Jewish world; his yeshiva trained the next generation of its leaders; and his presence drew others. The golden age of Tzfat — of the Ramak and the Arizal, of Lecha Dodi and Kabbalat Shabbat — grew up around his beit midrash. When you stand in it today, you stand where that age began.