But if pleasure be the sole good, the only possible criterion of pleasures is quantity of pleasure. "Higher" or "better" can only mean containing more pleasure. To speak of "better pleasures" in any other sense is to make the goodness of the sole good as an end depend upon something which, _ex hypothesi_, is not good as an end. Mill is as one who, having set up sweetness as the sole good quality in jam, prefers Tiptree to Crosse and Blackwell, not because it is sweeter, but because it possesses a better kind of sweetness. To do so is to discard sweetness as an ultimate criterion and to set up something else in its place. So, when Mill, like everyone else, speaks of "better" or "higher" or "superior" pleasures, he discards pleasure as an ultimate criterion, and thereby admits that pleasure is not the sole good. He feels that some pleasures are better than others, and determines their respective values by the degree in which they possess that quality which all recognise but none can define--goodness. By higher and lower, superior and inferior pleasures we mean simply more good and less good pleasures. There are, therefore, two different qualities, Pleasantness and Goodness. Pleasure, amongst other things, may be good; but pleasure cannot mean good. By "good" we cannot mean "pleasureable;" for, as we see, there is a quality, "goodness," so distinct from pleasure that we speak of pleasures that are more or less good without meaning pleasures that are more or less pleasant. By "good," then, we do not mean "pleasure," neither is pleasure the sole good. Mr. Moore goes on to inquire what things are good in themselves, as ends that is to say. He comes to a conclusion with which we all agree, but for which few could have found convincing and logical arguments: "states of mind," he shows, alone are good as ends.[9] People who have very little taste for logic will find a simple and satisfactory proof of this conclusion afforded by what is called "the method of isolation."