2p13l4d.md (405B)
1 Bodies (Lemma i.) are not distinguished in respect of 2 substance: that which constitutes the actuality (formam) of an 3 individual consists (by the last Def.) in a union of bodies; but 4 this union, although there is a continual change of bodies, will 5 (by our hypothesis) be maintained; the individual, therefore, 6 will retain its nature as before, both in respect of substance 7 and in respect of mode. Q.E.D. 8 9