Yet, if psychology be willing to learn in all these and other provinces of the estate of man, it must remember that, once it goes beyond the narrow range in which the interpretations of symbol and expression have become familiar, it is constantly liable to blunder in the inevitable effort to translate observation into theory. The happy mean between making too much of palpable differences and hurrying on to a similar rendering of similar signs is the rarest of gifts. Or, perhaps, it were truer to say it is the latest and most hardly won of acquirements. To learn to observe—observe with mind—is not a small thing. There are rules for it—both rules of general scope and, above all, rules in each special department. But like all “major premisses” in practice, everything depends on the power of judgment, the tact, the skill, the “gift” of applying them. They work not as mere rules to be conned by rote, but as principles assimilated into constituents of the mental life-blood: rules which serve only as condensed reminders and hints of habits of thought and methods of research which have grown up in action and reflection. To observe we must comprehend: yet we can only comprehend by observing. We all know how unintelligible—save for epochs of ampler reciprocity, and it may be even of acquired unity of interest—the two sexes are for each other. Parents can remember how mysteriously minded they found their own elders; and in most cases they have to experience the depth of the gulf which in certain directions parts them from their children’s hearts. Even in civilised Europe, the ordinary member of each nation has an underlying conviction (which at moments of passion or surprise will rise and find harsh utterance) that the foreigner is queer, irrational, and absurd. If the foreigner, further, be so far removed as a Chinaman (or an Australian “black”), there is hardly anything too vile, meaningless, or inhuman which the European will not readily believe in the case of one who, it may be, in turn describes him as a “foreign devil.” It can only be in a fit of noble chivalry that the British rank and file can so far temporise with its insular prejudice as to admit of “Fuzzy-wuzzy” that “He’s a poor benighted ’eathen—but a first-class fightin’ man.” Not every one is an observer who chooses to dub himself so, nor is it in a short lapse of time and with condescension for foreign habits, that any observer whatever can become a trustworthy reporter of the ideas some barbarian tribe holds concerning the things of earth and air, and the hidden things of spirits and gods. The “interviewer” no doubt is a useful being when it is necessary to find “copy,” or when sharp-drawn characters and picturesque incidents are needed to stimulate an inert public, ever open to be interested in some new thing. But he is a poor contributor to the stored materials of science.