166. (2) These three, Father, Son, and Holy Spirit, are the three essentials of the one God, and they make one as soul, body, and operation make one in man. In anyone thing there are both general and particular essentials, and these together make one essence. The general essentials of the one man are his soul, body, and operation. That these constitute one essence can be seen from this-that one is from the other and for the sake of the other in an unbroken series; for man gets his beginning from the soul, which is the very essence of the semen; and the soul not only initiates, but also produces in their order all things that pertain to the body, and afterward all things that proceed from the soul and body together, which are called operations. From this production, therefore, of one from the other, and the consequent ingrafting and conjunction, it can be seen that these three are of one essence, and therefore they are called three essentials.