"Leibowitz regarded Judaism as a religious and historical phenomenon, which is characterized by a recognition of the duty to serve God in performing mitzvot. The service of God according to binding halakhic norms must be "for its own sake" (li-shemah), and its purpose is not designed to achieve personal perfection or to improve society. Religion is thus not a means toward any specific end. Judaism is for Leibowitz not humanism, or a sentiment or a bundle of memories. Jews have the obligation to take upon themselves the yoke of Torah and mitzvot. Leibowitz's standpoint is thus neither anthropocentric or ethnocentric, but theocentric."