— 242 —
      §18. This way of talking, nevertheless, has prevailed, and, as
I guess, produced great confusion. For these being all different
Powers in the Mind, or in the Man, to do several Actions, he exerts
them as he thinks fit: But the power to do one Action, is not
operated on by the power of doing another Action. For the power
of Thinking operates not on the power of Chusing, nor the power
of Chusing on the power of Thinking; no more than the power of
Dancing operates on the power of Singing, or the power of Singing
on the power of Dancing, as any one, who reflects on it, will easily
perceive: And yet this is it which we say, when we thus speak, that
the Will operates on the Understanding, or the Understanding on the Will.
Locke Hum II, 21, §18, p. 242