על עשרת הדברות ח׳On the Decalogue 8
א׳
1[29] But why enumerate the virtues of Ten, which are infinite in number, and thus treat perfunctorily a task of supreme greatness which by itself is found to be an all-sufficing subject for students of mathematics?
ב׳
2But while we must leave unnoticed the rest, there is one which may without impropriety be mentioned as a sample.
ג׳
3[30] Those who study the doctrines of philosophy say that the categories in nature, as they are called, are ten only, substance, quality, quantity, relation, activity, passivity, state, position and the indispensables for all existence, time and place.
ד׳
4[31] There is nothing which does not participate in these categories. I have substance, for I have borrowed what is all-sufficient to make me what I am from each of the elements out of which this world was framed, earth, water, air and fire. I have quality in so far as I am a man, and quantity as being of a certain size. I become relative when anyone is on my right hand or my left, I am active when I rub or shave anything, or passive when I am rubbed or shaved. I am in a particular state when I wear clothing or arms and in a particular position when I sit quietly or am lying down, and I am necessarily both in place and time since none of the above conditions can exist without these two.