SIX MAJOR PROPHETS
lenged, it is never (logically) unchallenged. So it can not be said that because they work they are absolutely true. They are called true because they work, and there is no sense in calling anything true for any other reason; but the progress of knowledge may nevertheless supersede them at the next step.
Since Schiller indignantly repudiates the formula often ascribed to pragmatism that "All that works is true", and since Mr. Bradley has come to say[1] "I agree that any idea which in any way 'works' has in some degree truth", it would seem that these old antagonists are really not so far apart in their opinions as their words would indicate.
For classical authority for his Humanism Schiller goes back to the famous dictum of Protagoras: "Man is the measure of all things." In Plato's "Dialogues", Protagoras is represented as having been argued quite out of court by Socrates, but Schiller appeals to posterity against this decision, and he has written several supplemental dialogues of his own to prove that Protagoras was really in the right.[2]
Schiller's most serious work so far is his destructive criticism of the Aristotelian logic. Since my
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