Elisha ben Abuyah () (spelled variously, including Elisha ben Avuya) was a rabbi and Jewish religious authority born in Jerusalem sometime before 70 CE. After he adopted a worldview considered heretical by his fellow Tannaim, the rabbis of the Talmud refrained from relating teachings in his name and referred to him as the "Other One" (, ). In the writings of the Geonim this name appears as "Achor" ("backwards"), because Elisha was considered to have "turned backwards" by embracing heresy. Youth and activity Little is known of Elisha's youth and of his activity as a teacher of Jewish Law. He was the son of a rich and well-respected citizen of Jerusalem, and was trained for the career of a scholar. The only saying of his recorded in the Mishnah is his praise of education: "Learning Torah as a child is like writing on fresh paper, but learning Torah in old age is like writing on a palimpsest." Other sayings attributed to Elisha indicate that he stressed mitzvot (commandments) as equal in importance to education: To whom may a man who has good deeds and has studied much Torah be compared? To a man who in building [lays] stones first [for a foundation] and then lays bricks [over them], so that however much water may collect at the side of the building, it will not wash away. Contrariwise, he who has no good deeds even though he has studied much Torah — to whom may he be compared? To a man who in building lays bricks first and then heaps stones over them, so that even if a little water collects, it at once undermines the structure. He evidently had a reputation as an authority in questions of religious practice, since the Talmud records one of his halakhic decisions — the only one in his name, although others may be recorded under the names of his students or different rabbis. Elisha was a student of Greek; as the Talmud expresses it, "Acher's tongue was never tired of singing Greek songs". While still in the beth midrash, he is said to have kept forbidden books hidden in his clothes. Wilhelm Bacher, in his analysis of Talmudic legends, wrote that the similes attributed to Elisha (including the ones cited above) show that he was a man of the world, acquainted with wine, horses, and architecture. Some historians call into question his apostasy as