Chapter 4

Being is the common name for all things which are. It is divided into substance and accident. Substance is the principal of these two, because it has existence in itself and not in another. Accident, on the other hand, is that which cannot exist in itself but is found in the substance. For the substance is a subject, just as matter is of the things made out of it, whereas an accident is that which is found in the substance as in a subject. Copper, for example, and wax are substance; but shape, form and color are accidents. And a body is a substance, whereas color is an accident. For the body i