Many books of Hagada had existed in Palestine, whose contents were incorporated later in various Midrashim, and some ... in the Talmud, and even at that period there was a difference of opinion as to their value. Some valued them, and some despised them. The Hagadas consist of two elements: first, the external garment of the thought, the tradition, and secondly, the internal idea, allegorically shadowed forth, which constitutes literary value. The latter can be divided into three kinds: "P'shat," the interpretation of the meaning of biblical words; "Drash," a free untrammelled interpretation of the scriptural texts; "Sod," the deep mystic, religious meanings construed from the texts. By these three kinds of construction of Scripture, all subjects, topics and times are embraced and discussed. The Hagada, with its mystic and veiled religious wisdom, has exercised a great influence in the Oriental and heathen world, which has borrowed from it many precious gems of profound religious thought having Palestine for their birthplace.