5. If, we were to conclude that there were no matter in intelligible
entities, because they were immutable, and because, in them, matter is
always combined with (shape), we would be logically compelled to deny
the existence of matter in bodies; for the matter of bodies always
has a form, and every body is always complete (containing a form
and a matter). Each body, however, is none the less composite, and
intelligence observes its doubleness; for it splits until it arrives to
simplicity, namely, to that which can no longer be decomposed; it does
not stop until it reaches the bottom things. Now the bottom of each
thing is matter. Every matter is dark, because the reason (the form)
is the light, and because intelligence is the reason.[284] When, in an
object, intelligence considers the reason, it considers as dark that
which is below reason, or light. Likewise, the eye, being luminous,
and directing its gaze on light and on the colors which are kinds of
light, considers what is beneath, and hidden by the colors, as dark and
material.