Again, it does not necessarily follow, as some maintain, that there is something else better than pleasure, as the end is better than the process or transition to the end: for a pleasure is not a transition, nor does it always even imply a transition; but it is an activity [or exercise of faculty], and itself an end: further, it is not in becoming something, but in doing something that we feel pleasure: and, lastly, the end is not always something different from the process or transition, but it is only when something is being brought to the completion of its nature that this is the case.
For these reasons it is not proper to say that pleasure is a felt transition, but rather that it is an exercise of faculties that are in their natural state, substituting “unimpeded” for “felt.”
Some people, indeed, think that pleasure is a transition, just because it is in the full sense good, supposing that the exercise of faculty is a transition; but it is in fact something different. 205