Being constantly engaged in learning allows us to guard against the pervasive forgetfulness around us.

The human mind presents us with both a marvel and a mystery.

Capable of mastering a remarkable range of complex tasks, of remembering obscure experiences or facts, that same organ will also forget an important appointment, an acquaintance's name, or the contents of this morning's breakfast. Simultaneously able to outperform a computer in our manipulation of data into concepts, each of us also faces the unpleasant reality that we continually forget information we desperately desire or need.

Anyone who has reviewed notes taken in college or remarks scribbled in the margins of books read years ago has admitted to the enormity of what is routinely forgotten. It is not uncommon for authors to report rereading their own writing after the passage of several years with the uncomfortable sense that they are no longer the masters of what those essays or books contain.

Today's Torah portion hints at this problem, and the rabbinic tradition suggests a remarkable reason for such frustrating lapses of memory. In our portion, Moses "told the people of Israel that they should keep the Passover." Nothing surprising here, Moses often tells the Jewish people what they should or should not be doing.

Sifrei goes on by answering its own question. "This teaches that he heard the passage of the festival seasons at Sinai and stated it to Israel, and then went and repeated it to them when the time had actually arrived to keep the rules ... He stated to the people the laws for Passover at Passover, the laws for Shavuot at Shavuot, and the laws for Sukkot at that season."

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Rabbi Bradley Shavit Artson is Vice-President of the American Jewish University in Los Angeles and Dean of its Ziegler School of Rabbinical Studies.