 It follows from this conception of pleasure that every instance of pleasure must be good to some extent. For how could an unimpeded activity of a natural state be bad or a matter of indifference? On the other hand, Aristotle does not mean to imply that every pleasure should be chosen. He briefly mentions the point that pleasures compete with each other, so that the enjoyment of one kind of activity impedes other activities that cannot be carried out at the same time (1153a20–22). His point is simply that although some pleasures may be good, they are not worth choosing when they interfere with other activities that are far better. This point is developed more fully in Ethics X.5.