The word expedient means useful. So what does James mean by the claim: “‘The true,’ to put it very briefly, is only the expedient in the way of our thinking, just as ‘the right’ is only the expedient...

The word expedient means useful. So what does James mean by the claim: “‘The true,’ to put it very briefly, is only the expedient in the way of our thinking, just as ‘the right’ is only the expedient in the way of our behavior.” What does James mean by “useful” or “expedient”? Note that he adds the words: “and expedient in the long run and on the whole, of course.” What do these words add to his claim?