And it is precisely in this debatable ground of low motives and noble emotions--in the struggle, ever failing, yet ever renewed, to carry truth and justice into the administration of human society; in the establishment of states and in the overthrow of tyrannies; in the rise and fall of creeds; in the world of ideas; in the character and deeds of the great actors in the drama of life; where good and evil fight out their everlasting battle, now ranged in opposite camps, now and more often in the heart, both of them, of each living man--that the true human interest of history resides. The progress of industries, the growth of material and mechanical civilisation, are interesting, but they are not the most interesting. They have their reward in the increase of material comforts; but, unless we are mistaken about our nature, they do not highly concern us after all. Once more; not only is there in men this baffling duality of principle, but there is something else in us which still more defies scientific analysis. Mr. Buckle would deliver himself from the eccentricities of this and that individual by a doctrine of averages. Though he cannot tell whether A, B, or C will cut his throat, he may assure himself that one man in every fifty thousand, or thereabout (I forget the exact proportion), will cut his throat, and with this he consoles himself. No doubt it is a comforting discovery. Unfortunately, the average of one generation need not be the average of the next. We may be converted by the Japanese, for all that we know, and the Japanese methods of taking leave of life may become fashionable among us. Nay, did not Novalis suggest that the whole race of men would at last become so disgusted with their impotence, that they would extinguish themselves by a simultaneous act of suicide, and make room for a better order of beings? Anyhow, the fountain out of which the race is flowing perpetually changes--no two generations are alike. Whether there is a change in the organisation itself, we cannot tell; but this is certain, that as the planet varies with the atmosphere which surrounds it, so each new generation varies from the last, because it inhales as its atmosphere the accumulated experience and knowledge of the whole past of the world. These things form the spiritual air which we breathe as we grow; and in the infinite multiplicity of elements of which that air is now composed, it is for ever matter of conjecture what the minds will be like which expand under its influence. From the England of Fielding and Richardson to the England of Miss Austen--from the England of Miss Austen to the England of Railways and Free-trade, how vast the change; yet perhaps Sir Charles Grandison would not seem so strange to us now, as one of ourselves will seem to our great-grandchildren. The world moves faster and faster; and the difference will probably be considerably greater.