If our intellect were incapable of being perfected on its
own and of then perfecting our will, we would not be human
at all; we would be animals. If there were no separation
between our will and our intellect and if the intellect
could not rise above the will, we would be unable either
to think or to say what we thought. We would only be
able to make noises that expressed our feelings.
—True Christianity 588:2