PREFACE.
I now pass on to explaining the results, which must necessarily follow from the essence of God, or of the eternal and infinite being; not, indeed, all of them (for we proved in Part i., Prop.xvi., that an infinite number must follow in an infinite number of ways), but only those which are able to lead us, as it were by the hand, to the knowledge of the human mind and its highest blessedness.
DEFINITIONS DEFINITION I.

By body I mean a mode which expresses in a certain determinate manner the essence of God, in so far as he is considered as an extended thing.

(See Pt.i., Prop.

xxv., Coroll.) DEFINITION II.

I consider as belonging to the essence of a thing that, which being given, the thing is necessarily given also, and, which being removed, the thing is necessarily removed also; in other words, that without which the thing, and which itself without the thing, can neither be nor be conceived.
DEFINITION III.