2p17d.md (597B)
1 This proposition is self–evident, for so long as the 2 human body continues to be thus affected, so long will the human 3 mind (II. xii.) regard this modification of the body–that is (by 4 the last Prop.), it will have the idea of the mode as actually 5 existing, and this idea involves the nature of the external body. 6 In other words, it will have the idea which does not exclude, but 7 postulates the existence or presence of the nature of the 8 external body; therefore the mind (by II. xvi., Coroll. i.) will 9 regard the external body as actually existing, until it is 10 affected, &c. Q.E.D. 11 12