Then comes the inevitable question - "Why?" - and its catch-all answer: "Because I told you so."Jewish tradition identifies three categories of biblical commands. There are mishpatim, those commands - like the prohibitions of murder and theft - that are utterly logical and the bedrock of any functioning society. There are eidot, "testimonies," that at first glance have no logic, but implicitly have a connection to something else and so can be understood (the keeping of Shabbat, which serves as a remembrance of the seventh day of creation). And then, there are the decrees. These laws - such as kashrut and family purity - have no logical basis. But we can fathom why they are adhered to in Jewish circles.Clearly, our DNA demands that we constantly ask "Why?" The Talmud even identifies one commandment - of learning the Torah - as equal to all the others. But the Jewish people are also the people who, when standing at the foot of Mount Sinai, declared: "We will do, and [then] we will understand."