In the course of the centuries the development of the Midrash, or study of the Law, lay along the two strongly marked lines of Halacha, the explanation and formulating of laws, and Haggada, their poetical illustration and ethical application. These are the two spheres within which the intellectual life of Judaism revolved, and these the two elements, the legal and the æsthetic, making up the Talmud. The two Midrashic systems emphasize respectively the rule of law and the sway of liberty: Halacha is law incarnate; Haggada, liberty regulated by law and bearing the impress of morality. Halacha stands for the rigid authority of the Law, for the absolute importance of theory--the law and theory which the Haggada illustrates by public opinion and the dicta of common-sense morality. The Halacha embraces the statutes enjoined by oral tradition, which was the unwritten commentary of the ages on the written Law, along with the discussions of the academies of Palestine and Babylonia, resulting in the final formulating of the Halachic ordinances. The Haggada, while also starting from the word of the Bible, only plays with it, explaining it by sagas and legends, by tales and poems, allegories, ethical reflections, and historical reminiscences. For it, the Bible was not only the supreme law, from whose behests there was no appeal, but also "a golden nail upon which" the Haggada "hung its gorgeous tapestries," so that the Bible word was the introduction, refrain, text, and subject of the poetical glosses of the Talmud. It was the province of the Halacha to build, upon the foundation of biblical law, a legal superstructure capable of resisting the ravages of time, and, unmindful of contemporaneous distress and hardship, to trace out, for future generations, the extreme logical consequences of the Law in its application. To the Haggada belonged the high, ethical mission of consoling, edifying, exhorting, and teaching a nation suffering the pangs, and threatened with the spiritual stagnation, of exile; of proclaiming that the glories of the past prefigured a future of equal brilliancy, and that the very wretchedness of the present was part of the divine plan outlined in the Bible. If the simile is accurate that likens the Halacha to the ramparts about Israel's sanctuary, which every Jew was ready to defend with his last drop of blood, then the Haggada must seem "flowery mazes, of exotic colors and bewildering fragrance," within the shelter of the Temple walls.