In The New Testament the word ‘Law’ is largely equivalent to what we today call the Old Testament. But there are exceptions to this use of the term. The Law sometimes designates the Pentateuch. This is the case in the liturgy of the Synagogue. But for the Jews the term ‘Law’ also could include their entire religious tradition. It governed the daily life of the people—not only in matters of what we call worship, morality, ethics or religion but also in matters legal, social and political. Additions to the commandments found in the Pentateuch and the commentaries that had been added and still were being added, were not thought to be something foreign to the law. It was thought that they simply applied what the Scriptures said. The phrase ‘it has been said to them of old times’ is often understood as being merely a formula of disapproval, since in the Gospels Jesus criticised these rules. But their original purpose was to continue the tradition of which the Scriptures were the core. Their contemporary significance was manifest in the constantly renewed discussion of how they were to be interpreted and applied. For this purpose casuistic rules were needed, that took into account all the concrete situations of life. Thus a lawabiding Jew could always know how he had to act.