The Art of Tetman Callis

“Every instruction is composed of two things: (a) making what is being studied comprehensible and causing its idea to be established in the soul and (b) causing others to assent to what is comprehended and established in this soul. There are two ways of making a thing comprehensible: first, by causing its essence to be perceived by the intellect, and second, by causing it to be imagined through the similitude that imitates it. Assent, too, is brought about by one of two methods, either the method of certain demonstration or the method of persuasion. Now when one acquires knowledge of the beings or receives instruction in them, if he perceives their ideas themselves with his intellect, and his assent to them is by means of certain demonstration, then the science that comprises these cognitions is philosophy. But if they are known by imagining them through similitudes that imitate them, and assent to what is imagined of them is caused by persuasive methods, then the ancients call what comprises these cognitions religion. And if those intelligibles themselves are adopted, and persuasive methods are used, then the religion comprising them is called popular, generally accepted, and external philosophy.  Therefore, according to the ancients, religion is an imitation of philosophy. Both comprise the same subjects and both give an account of the ultimate principles of the beings. For both supply knowledge about the first principle and cause of the beings, and both give an account of the ultimate end for the sake of which man is made—that is, supreme happiness—and the ultimate end of every one of the other beings. In everything of which philosophy gives an account based on intellectual perception or conception, religion gives an account based on imagination. In everything demonstrated by philosophy, religion employs persuasion.” – Abu Nasr al-Farabi, The Attainment of Happiness (trans. Hyman; emphases in original)