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appetite for fulfillment. Rather, each has a powerful  appetite  to be joined to the
other, the soul to perfect the body, the body to be perfected by the soul. So, even
though the soul can exist after the dissolution of the body, it is fully actualized only
when it is united to the body. Hence, the soul is not, as Plato thought, imprisoned
in the body. Rather, the soul longs for the body. “The completion of nature,”
Bonaventure said, requires that humans be composed both “of body and soul, just
as of matter and form.” This is
how body and soul, though two substances,
constitute a genuine unity.
Is resurrection, then, a natural or a supernatural event? Bonaventure answered 
that reconstituting the body after bodily death, which is required for there to be 
a resurrection, is contrary to nature and hence a supernatural event. Reuniting 
body and soul in the reconstitution is in accord with nature (secundum naturam
and hence a natural event. However, reuniting body and soul inseparably, as 
occurs in the afterlife, is not natural but supernatural. The reason for this is that 
the body is naturally corruptible. In its being joined to the soul in the resurrec-
tion, what had been corruptible—the body—becomes incorruptible—but this 
supernaturally. 
Even though reconstituting the body is contrary to nature, the body reconsti-
tuted, Bonaventure said, is still the same body: “If an ark is dismantled and then 
remade from the same planks, according to the same order, we do not say it is 
another ark, but the same.” Bonaventure said that, in the resurrection, God, 
“like a good craftsman” uses the stuff into which the human body has dissolved, 
in the same arrangement, to reform the same human body. Bonaventure may 
have been the first to point out that certain misleading biological analogies, such 
as one finds in St. Paul, are not good analogies for the resurrection. But neither, 
he claimed, is his own ark analogy. In the resurrection, when body particles are 
brought together, they are not bits of inert stuff but infused with something akin 
to feeling. So the resurrection should be analogized psychologically, on the model 
of yearning. In particular, it should be understood by analogy with the love of a 
man for a woman.
Like Bonaventure, Aquinas was an Italian, but a Dominican who spent the
important part of his career at the University of Paris.
9
Following his interpretation
of Aristotle, he held that the human soul is a unity in which there are faculties or
powers of acting. These faculties are hierarchically arranged: vegetative, sensitive,
and then rational. The passive intellect, a power neither wholly sensitive nor wholly
rational, is at the lowest level of the rational faculty. It deals only with particular
knowledge, not with universals. Above the passive intellect are the
active and
possible (or potential) intellects, including intellectual memory, which have as their
object being in general.