one definite thing, absolutely indefinable, some one thing that is the same in all the various degrees and in all the various kinds of it that there may be. We may be able to say how it is related to other things: that, for example, it is in the mind, that it causes desire, that we are conscious of it, etc., etc. We can, I say, describe its relations to other things, but define it we can not. And if anybody tried to define pleasure for us as being any other natural object; if anybody were to say, for instance, that pleasure means the sensation of red, and were to proceed to deduce from that that pleasure is a colour, we should be entitled to laugh at him and to distrust his future statements about pleasure. Well, that would be the same fallacy which I have called the naturalistic fallacy. That ‘pleased’ does not mean ‘having the sensation of red,’ or anything else whatever, does not prevent us from understanding what it does mean. It is enough for us to know that ‘pleased’ does mean ‘having the sensation of pleasure,’ and though pleasure is absolutely indefinable, though pleasure is pleasure and nothing else whatever, yet we feel no difficulty in saying that we are pleased. The reason is, of course, that when I say ‘I am pleased,’ I do not mean that ‘I’ am the same thing as ‘having pleasure.’ And similarly no difficulty need be found in my saying that ‘pleasure is good’ and yet not meaning that ‘pleasure’ is the same thing as ‘good,’ that pleasure means good, and that good means pleasure. If I were to imagine that when I said ‘I am pleased,’ I meant that I was exactly the same thing as ‘pleased,’ I should not indeed call that a naturalistic fallacy, although it would be the same fallacy as I have called naturalistic with reference to Ethics. The reason of this is obvious enough. When a man confuses two natural objects with one another, defining the one by the other, if for instance, he confuses himself, who is one natural object, with ‘pleased’ or with ‘pleasure’ which are others, then there is no reason to call the fallacy naturalistic. But if he confuses ‘good,’ which is not in the same sense a natural object, with any natural object whatever, then there is a reason for calling that a naturalistic fallacy; its being made with regard to ‘good’ marks it as something quite specific, and this specific mistake deserves a name because it is so common.
