Revival of the Hebrew language well-recognized sources, chiefly the Tanakh (especially those portions used liturgically like the Torah, Haftarot, Megilot, and the Book of Psalms) and the Mishnah. Apart from these, Hebrew was known through hymns, prayers, midrashim, and the like. During the Middle Ages, Hebrew continued in use as a written language in Rabbinical literature, including in judgments of Halakha, Responsa, and books of meditation. In most cases, certainly in the base of Hebrew's revival, 18th- and 19th-century Europe, the use of Hebrew was not at all natural, but heavy in flowery language and quotations, non-grammatical forms, and mixing-in of other languages, especially Aramaic.
Revival of the Hebrew language taught Hebrew. While immigrant children were expected to learn Hebrew through school, much effort was put into ensuring adults would learn the language. The institution of the ulpan, or intensive Hebrew-language school, was established to teach immigrants basic Hebrew language skills, and an ulpan course became a major feature of the experience of immigrating to Israel. Young adult immigrants picked up much of their Hebrew through mandatory military service in the Israel Defense Forces, which aimed to teach soldiers Hebrew so they could function in the military and post-military civilian life. During the 1950s, Hebrew was taught in most military