Islamic philosophers call nature and what is beyond nature natural science, taking inspiration from Greece, and what we call natural philosophy according to the distinction that must be adhered to in the modern era between philosophy and science. The concept of science now is that it is the knowledge of bodies by analyzing them into their parts perceived by the senses, describing the composition of these parts with each other, determining the laws of phenomena as they appear to the senses as well, and arranging the laws from the most specific to the most general, until we arrive at one comprehensive law; While the mind has always penetrated as deep as sensory knowledge reaches; If he presented nature, he tried to explore the "internal and primary principles" that make up the natural body. What is meant by intrinsic principles are those that are the essence of essence and are not additional to it. What is meant by primary principles are those that precede the occurrence of symptoms and a link between symptoms and essence, and they are nothing but the principles of essence.