I have tried to show pragmatism as a moment in the swing of thought from realism to idealism, and how for it the most vital, that is to say, the mora… - Edgar A. Singer, Jr.

It is seldom given to philosophers to enter into one another's enthusiasms, but they are sometimes allowed to share a disappointment. And could anything be more generally disappointing than the attitude of a certain important group of natural philosophers toward the study of minds?

"All things excellent are as difficult as they are rare." These words which bring to a close Spinoza's masterpiece Ethics, after the manner of Geometry, sum up the experience of a life as rare as it was difficult.

"The serious meaning of a concept," writes James, following Peirce, "lies in the concrete difference to some one which its being true will make. Strive to bring all debated conceptions to that "pragmatic" test, and you will escape vain wrangling. … If it can make no practical difference whether a given statement be true or false, then the statement has no real meaning."
If the method defined in this passage be accepted, and I can not see how any one can fail to accept it even if one prove unfaithful to it afterwards, then could anything more fully illustrate the meaning of the 'meaningless' than that hypothesis of other minds in which the analogy argument culminates? Whatever may be said for the reasoning, is its conclusion at least right? Alas, I can not know. If right, my experience cannot inform me if wrong, my experience cannot disillusion me. It makes no practical difference to me whether I am right or wrong. Pragmatic conclusion: I cannot have made a meaningful hypothesis.