2p26d.md (437B)
1 If the human body is in no way affected by a given 2 external body, then (II. vii.) neither is the idea of the human 3 body, in other words, the human mind, affected in any way by the 4 idea of the existence of the said external body, nor does it in 5 any manner perceive its existence. But, in so far as the human 6 body is affected in any way by a given external body, thus far 7 (II. xvi. and Coroll.) it perceives that external body. Q.E.D. 8 9