We have already described in the foregoing tractate the conformity of philosophy with the Law, and its other relations. We have said there that the Law is of two kinds: exoteric and esoteric. The duty of the common people is to follow the exoteric law; while the duty of learned men is to follow the esoteric one. So the duty of the common people is to follow the meanings of the Law in their literal sense, leaving aside every interpretation of it. The learned men are not permitted to expose their interpretations to the common people, as Ali, (upon whom be peace) has said, “Tell the people what they can understand. Do you wish to give the lie to God and His Apostle?” So I thought that in the present book I should examine the exoteric meanings which the Law intends the common people to follow, and in those, search the real purpose of the Law-giver, (on whom be peace) according to my ability and knowledge. For the people of His Law have been extremely disturbed, so much so that many misguided sects and different divisions, have been produced, every one of which thinks that it is following the best Law, and that he who disagrees is either an innovator or an infidel whose life and property is at stake. All this is directly opposed to the purpose of the Law-giver. Its cause lies in the misleading things about the Law which have been put forward. In our own times, there are four of these sects which are famous. In the first place, there is the sect of the Asharites, and these are the people who are commonly taken to be men of _Sunna_. Then there are Mutazilites, the sects of the Batinites, (Esoteric), and the sect of the Bombasts. Every one of these sects has its own peculiar beliefs about God, and has turned many an exoteric word of the law to interpretations, which they have applied to those beliefs. They think that theirs was the original Law which all the people are asked to follow, and he who deviates from it is either an innovator or an infidel. But when you look into all their views and then examine the purpose of the Law, it would appear that a great part of them are recent opinions and innovating interpretations. Of them I will mention here those indispensable beliefs in the Law, without which Faith does not become complete, and will search, in every one of them, the real purpose of the Law-giver, (peace be upon him,) beyond that which has been made the basis of the Law, and its beliefs before the coming into use of incorrect interpretations. I will begin by explaining the intention of the Law-giver as to the beliefs which should be held by the common people about God, and the methods which He adopted towards them. All this is contained in the Divine Book. We will begin by an exposition of the methods which leads to the knowledge of the existence of the Creator, for this is the first thing which a student ought to know. But before this, it is necessary that we should mention the opinions of the well-known sects.