According to a commentary on the constitution, just as the establishment of Islamic republic system is based on the beliefs of people, namely governing of right, justice and Quran. However, its continuation lasted with the same principles and there is an important role for the beliefs of Iranian people. Furthermore, those beliefs are of complete and determinate roles in all affairs. They are considered as guidelines for governors and statesmen. There is an important role for beliefs such as the principle of unity of God and believing in it. In spite of that, there are other principles are to the submission in front of Allah and His order. Therefore, legislation is limited to Allah and laws so far as correspond to divine legislation are valid. Belief in divine revelation and prophecy are essential to Islamic worldview and there are two kinds of justice. The first kind is legislative ("Tashri'i") and the other kind is creative ("Takivini"). Creative justice is based on justice and equality. Legislative justice is respected to making divine law in Islamic society. Besides, the basis of Shia school is in terms of imamate or leadership.