 The conception of pleasure that Aristotle develops in Book X is obviously closely related to the analysis he gives in Book VII. But the theory proposed in the later Book brings out a point that had received too little attention earlier: pleasure is by its nature something that accompanies something else. It is not enough to say that it is what happens when we are in good condition and are active in unimpeded circumstances; one must add to that point the further idea that pleasure plays a certain role in complementing something other than itself. Drawing well and the pleasure of drawing well always occur together, and so they are easy to confuse, but Aristotle’s analysis in Book X emphasizes the importance of making this distinction.