In general, the actualizations of immaterial (natures) do not in any
way imply that these (natures) were altered--which would imply their
destruction--but, on the contrary, they remain what they were. Only
material things are affected, while active. If an immaterial principle
were exposed to undergo affections, it would no longer remain what it
is. Thus in the act of vision, the sight acts, but it is the eye that
is affected. As to opinions, they are actualizations analogous to sight.