3p13d.md (602B)
1 So long as the mind conceives anything of the kind 2 alluded to, the power of the mind and body is diminished or 3 constrained (cf. III. xii. Proof); nevertheless it will continue 4 to conceive it, until the mind conceives something else, which 5 excludes the present existence thereof (II. xvii.); that is (as 6 I have just shown), the power of the mind and of the body is 7 diminished, or constrained, until the mind conceives something 8 else, which excludes the existence of the former thing conceived: 9 therefore the mind (III. ix.), as far as it can, will endeavour 10 to conceive or remember the latter. Q.E.D. 11 12