Each object has general essentials and particular essentials; and the two together make up a single essence. A person's general essentials are his soul, body and activity. These make up a single essence, as can be seen from the fact that one arises from the next, and exists on account of the next, in an unbroken chain. Every person starts from the soul, which is the true essence of the seed. This not only initiates but also produces one after the other the bodily structures; and later on it initiates the products of the soul and the body working together, what are called its activities. Since then one is produced by the next and by its being implanted and attached, it is plain that these three belong to a single essence. This is why they are called the three essentials.