There are two major approaches to the study of, and commentary on, the Tanakh. In the Jewish community, the classical approach is a religious study of the Bible, where it is assumed that the Bible is divinely inspired. Another approach is to study the Bible as a human creation. In this approach, Biblical studies can be considered as a sub-field of religious studies. The latter practice, when applied to the Torah, is considered heresy by the Orthodox Jewish community. As such, much modern day Bible commentary written by non-Orthodox authors is considered forbidden by rabbis teaching in Orthodox yeshivas. Some classical rabbinic commentators, such as Abraham Ibn Ezra, Gersonides, and Maimonides, used many elements of contemporary biblical criticism, including their knowledge of history, science, and philology. Their use of historical and scientific analysis of the Bible was considered acceptable by historic Judaism due to the author's faith commitment to the idea that God revealed the Torah to Moses on Mount Sinai.