How did Judaism develop from its biblical roots to the highly developed system we know today? What has changed and what has remained constant? The answers to these questions are relevant to all faiths, as well as to anyone seeking to broaden their understanding of ancient history - a past that is inexorably linked to the present. The roots of Judaism reach back to the Hebrew Bible - also known as the Old Testament by Christians. For thousands of years, Jews have looked to these scriptures for their origins, and have located in them the tenets of their faith. The Bible provides Jews reasons for sadness and joy, wisdom, and most of all, a profound belief in what God expects of them and has promised to them. Though Jews of every generation have recognized and cherished the Bible as the ultimate source of all Jewish existence, much of what is recognized today as Judaism does not appear in the Bible. For example, worshipping in places other than the single, original Temple in Jerusalem is expressly forbidden by the Bible. Nevertheless, Jews today worship in synagogues wherever there might be a Jewish community. Similarly, the Rabbinic model, for centuries the most visible example of religious and communal leadership among Jews, is not mentioned anywhere in the Bible.