6. We have sufficiently demonstrated the impassibility of intelligible
"being" which is entirely comprised within the genus of form. But as
matter also, though in another manner, is an incorporeal entity, we
must examine its nature also. We must see whether it may be affected,
and undergo every kind of modification, as is the common opinion; or
whether, on the contrary, it be impassible; and in this case, what is
the nature of its impassibility.