I NOW proceed to explain things that must necessarily follow from the Essence of God, the Eternal and Infinite Being. I do not say everything (for it has been demonstrated by Proposition 16, Part I., that from this Being an infinity of things in infinite modes must follow), but those things only that may lead us, as it were by the hand, to a knowledge of the human soul and of that wherein man's true happiness consists.
I. By body I understand a mode which in a certain determinate way expresses the essence of God, in so far considered as God is extended being. (Vide Coroll. to Prop. 25, Part I.†)____________________