Is Jewish Law Rational?

A philosophical vindication of Judaism based on IV Maccabees:

To someone raised with a notion of philosophy that is Greek, along the lines of Plato and Aristotle, there is something a bit odd about traditional Judaism, with its insistence on a large number of little restrictions on things like diet. One might be tempted to argue that there is nothing philosophical or rational about only eating animals that are cloven-footed and cud-chewing, particularly given that there is no overarching reason given for it. One might think: It’s just there in the book, so Jews do it; utterly irrational. What value could such a life hold for those who value reason?

Perhaps one of the more interesting Jewish responses to this general type of argument is found in the book usually known as IV Maccabees.

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Thus Jewish life is, because of the Torah, a training in what the Greeks would have recognized as the four cardinal virtues. (The author’s adaptation of the occasional Greek practice of putting piety, eusebia, in the place of practical wisdom or prudence makes excellent sense when one considers the ancient Jewish trope that reverence for God is the beginning of wisdom.) Antiochus wishes to say that Jews are irrational for following kosher laws; but Eleazar argues instead that following kosher laws is an instruction in temperance, fortitude, justice, and piety. On the basis of it, Jews train their reason to control their passions, to hold steady in misfortune, to consider others, and to worship God in an appropriate way.