2p18d.md (498B)
1 The mind (II. xvii. Coroll.) imagines any given body, 2 because the human body is affected and disposed by the 3 impressions from an external body, in the same manner as it is 4 affected when certain of its parts are acted on by the said 5 external body; but (by our hypothesis) the body was then so 6 disposed, that the mind imagined two bodies at once; therefore, 7 it will also in the second case imagine two bodies at once, and 8 the mind, when it imagines one, will straightway remember the 9 other. Q.E.D. 10 11