general propositions of the Mutakallemim, by which they prove the act of creation, the Existence of God, His Unity and His Incorporeality. I intend to explain their method, and also to point out the inferences which are to be drawn from each proposition. After this, I shall describe those theories of the philosophers which are closely connected with our subject, and I shall then explain their method. Do not ask me to prove in this work the propositions of the philosophers, which I shall briefly mention to you; they form the principal part of Physics and Metaphysics. Nor must you expect that I should repeat the arguments of the Mutakallemim in support of their propositions, with which they wasted their time, with which the time of future generations will likewise be wasted, and on which numerous books have been written. Their propositions, with few exceptions, are contradicted by the visible properties of things, and beset with numerous objections. For this reason they were obliged to write many books and controversial works in defence of their theories, for the refutation of objections, and for the reconciliation of all apparent contradictions, although in reality this object cannot be attained by any sophistical contrivance. As to the propositions of the philosophers which I shall briefly explain, and which are indispensable for the demonstration of the three principles—the Existence, the Unity, and the Incorporeality of God, they will for the greater part be admitted by you as soon as you shall hear them and understand their meaning; whilst in the discussion of other parts reference must be made for their proofs to works on Physics and Metaphysics, and if you direct your attention to such passages as will be pointed out to you, you will find everything verified that requires verification.