 Hedonism implies that the mental state of pleasure is the only thing having intrinsic value (and the mental state of pain is the only intrinsic evil). All other things have only extrinsic value; they have value just insofar as they bring about, mediately or directly, intrinsic value (or disvalue). It follows that actions, activities, etc. can have only extrinsic value, and it would seem that their value should depend entirely upon the quantity of pleasure that they produce, where quantity is a function of the number of pleasures, their intensity, and their duration. This would mean that one kind of activity or pursuit is intrinsically no better than another. If we correctly value one more than another, it must be because the first produces more numerous, intense, or durable pleasures than the other.