R. David Kasher on Parashat Tazria: Covenantal Numerology

From the very beginning, the Torah imbues certain numbers with great significance.  The first chapter of Genesis carefully divides Creation into seven days.  Seven then becomes the most significant number in nearly all Jewish time rituals—not just Shabbat, but Pesah, Shavuot, Sukkot, as well as the seventh month, the seventh year, the seven cycles of seven years—all of which are then imprinted with the themes of that first seven: creation, rest, and rejuvenation.An awareness of the Torah’s “numbers of distinction” and their significance can help us decode  the complex structure of the birth ritual that opens Parashat Tazria, and the mysterious set of numbers it contains: