 Book X offers a much more elaborate account of what pleasure is and what it is not. It is not a process, because processes go through developmental stages: building a temple is a process because the temple is not present all at once, but only comes into being through stages that unfold over time. By contrast, pleasure, like seeing and many other activities, is not something that comes into existence through a developmental process. If I am enjoying a conversation, for example, I do not need to wait until it is finished in order to feel pleased; I take pleasure in the activity all along the way. The defining nature of pleasure is that it is an activity that accompanies other activities, and in some sense brings them to completion. Pleasure occurs when something within us, having been brought into good condition, is activated in relation to an external object that is also in good condition. The pleasure of drawing, for example, requires both the development of drawing ability and an object of attention that is worth drawing.