For some temperaments, especially those who struggle against being caught up in compulsive behavior, traditional religious practice can be especially difficult. The attention Judaism gives to the details of proper performance can be overwhelming and frightening, particularly for those who approach it from without, rather than having lived since childhood with regular and comfortable norms of Jewish practice. . . . It is important to remember that nobody, not even the seemingly most pious person, fulfills all the 613 commandments. . . . Therefore the sages said long ago that fulfilling the commandments is a collective obligation of the Jewish people.

Arthur Green, Ehyeh: A Kabbalah for Tomorrow