In modern times, Judaism lacks a centralized authority that would dictate an exact religious dogma. Because of this, many different variations on the basic beliefs are considered within the scope of Judaism. Even so, all Jewish religious movements are, to a greater or lesser extent, based on the principles of the Hebrew Bible and various commentaries such as the Talmud and Midrash. Judaism also universally recognizes the Biblical Covenant between God and the Patriarch Abraham as well as the additional aspects of the Covenant revealed to Moses, who is considered Judaism's greatest prophet. In the Mishnah, a core text of Rabbinic Judaism, acceptance of the Divine origins of this covenant is considered an essential aspect of Judaism and those who reject the Covenant forfeit their share in the World to Come.