The Jews as a people receive their first commandment in today's Torah portion. The few preceding commandments were given to individuals, Abraham for example was given the mitzvah of circumcision. The reckoning of the calendar according to lunar cycles introduces Israel to formal Judaism. The lunar calendar must obviously have a special quality beyond its specific function, a pervasive characteristic to merit its beginning Jewry's service of G-d. The moon has phases of growth, decline, disappearance, and rebirth. The sun is relatively constant, not appreciably different from day to day. The lunar calendar rather than the solar governs the religious...