Chapter IV.
Now since every Percipient Faculty works upon the Object answering to it, and perfectly the Faculty in a good state upon the most excellent of the Objects within its range (for Perfect Working is thought to be much what I have described; and we will not raise any question about saying “the Faculty” works, instead of, “that subject wherein the Faculty resides”), in each case the best Working is that of the Faculty in its best state upon the best of the Objects answering to it. And this will be, further, most perfect and most pleasant: for Pleasure is attendant upon every Percipient Faculty, and in like manner on every intellectual operation and speculation; and that is most pleasant which is most perfect, and that most perfect which is the Working of the best Faculty upon the most excellent of the Objects within its range.
And Pleasure perfects the Working. But Pleasure does not perfect it in the same way as the Faculty and Object of Perception do, being good; just as health