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io CONCERNING BEING AND ESSENCE 

This determination or designation, however, which is in the 
species in respect to genus is not by means of something exist- 
ing in the essence of species, which is in no mode in the essence 
of genus; nay, whatever is in species is in genus as something 
undetermined. For if animal is not the whole of man, but part 
of him, it is not predicated of him, since no integral part is 
predicated of its whole. 

But how this is related can be seen if one observes how body 
differs according as animal is posited as part or as genus; for 
it cannot be genus in the same mode in which it is an integral 
part. This name body, therefore, is taken in several senses. For 
body according as it is in the genus of substance is asserted of 
that which has a nature such that three dimensions can be 
designated in it; in truth the three designated dimensions them- 
selves are body which is in the genus of quantity. But it hap- 
pens in things that what has one perfection may also aim at 
further perfection; as for instance is clear in the case of man, 
since he has both a sensitive nature and further, intellectual 
nature. Likewise indeed beyond this perfection which is to have 
such a form that three dimensions can be designated in it, 
another perfection can be added, as life or something of this 
sort. This name body, therefore, can signify a certain thing 
which has a form such that from it follows the possibility of 
designating three dimensions in it, with this limitation, 
namely, that from that form no further perfection may follow, 
but if anything else is added it is beyond the significance of 
body thus spoken of. And in this mode body is an integral and 
material part of animal, because thus soul will be beyond what 
is signified by the name body and will be something added 
to (excelling) body itself in such wise that from these two, that 
is, from soul and body, the animal is constituted as from its 
parts. This name body can also be taken so as to signify a 
certain thing which has a form such that from the form three