After this explanation the author proceeds to discuss the impropriety of assigning attributes to God. The Attributists admit that God is the Primal Cause, One, incorporeal, free from emotion and privation, and that He is not comparable to any of His creatures. Maimonides therefore contends that any attributes which, either directly or indirectly, are in contradiction to this creed, should not be applied to God. By this rule he rejects four classes of attributes: viz., those which include a definition, a partial definition, a quality, or a relation. The definition of a thing includes its efficient cause; and since God is the Primal Cause, He cannot be defined, or described by a partial definition. A quality, whether psychical, physical, emotional, or quantitative, is always regarded as something distinct from its substratum; a thing which possesses any quality, consists, therefore, of that quality and a substratum, and should not be called one. All relations of time and space imply corporeality; all relations between two objects are, to a certain degree, a comparison between these two objects. To employ any of these attributes in reference to God would be as much as to declare that God is not the Primal Cause, that He is not One, that He is corporeal, or that He is comparable to His creatures. There is only one class of attributes to which Maimonides makes no objection, viz. such as describe actions, and to this class belong all the Divine attributes which occur in the Scriptures. The “Thirteen Attributes” (shelosh esreh middot, Exod. xxxiv. 6, 7) serve as an illustration. They were communicated to Moses when he, as the chief of the Israelites, wished to know the way in which God governs the universe, in order that he himself in ruling the nation might follow it, and thereby promote their real well-being.