Art is (1) a messenger of discontent, yet (2) no teacher of new ideals, but rather (3) an inspiration to each it touches, himself to turn creator of … - Edgar A. Singer, Jr.

"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.

I have somewhere found it recorded that as Johann Gottlieb Fichte progressed with his first reading of Kant's "Critique of Pure Reason," he was moved to tears. To those who have labored through the tortured pages of the great German thinker this would be no matter for surprise, were it not for the quality of the tears: not those of vexation and baffled understanding, indeed, but of enthusiasm and sheer gratitude. For Fichte had fallen into the melancholy persuasion of Spinoza. At least, certain views of this austere thinker of the seventeenth century appeared to Fichte as no less gloomy in their implication than irresistible in the logic which led to them. Irresistible were the reasons which had driven Spinoza to look upon nature as governed by inexorable Fate. In the world as a whole there was no purpose, in its parts there was no freedom.

The straightest way to the heart of old matters is an old letter.