But while ignoring distinctions between Past and Present, even our nearer ancestors conducted much of their thinking in elaborate water-tight compartments; for they conceived of “Truth” as a battleship, continually exposed to the murderous broadsides of “Error.” Of these hermetic partitions, say, between _Faith_ and _Reason_, _Body_ and _Soul_, or _Good_ and _Evil_, Intelligence has already rammed in a number, without drowning us. _Error_ itself has lost its capital E, being usually called _Mistake_. And, what is more important, we have begun to notice that it and _Truth_ are not at all irreconcilable, but cradled originally together, and sometimes intermarrying, with mixed or alternating generations, as by Mendelian rules; but very rarely, either Truth or Error, affording us a pure breed. These examples will have justified, I trust, my contention that Intelligence is specially fitted to deal with Change. Not to praise or blame it after mature deliberation, like solemn and sedentary Reason; still less to filter concrete realities into immutable, because purely abstract, entities, which is the business of scientific thought; but just to perceive change on its passage and in so far help us to make the best of its coming. Need one add that Intelligence is far more liable to mistakes than either “Reason” or “Logic”? But its mistakes, though so much more numerous, are, methinks, less massively enthroned and less likely to block the way than theirs, for there is something self-satisfied and without appeal about “Reason” and “Logic”: does not the one issue “dictates” and the other enunciate “laws”? Whereas the mistakes which Intelligence commits to-day, it will, in its light-hearted way, correct to-morrow, being as little ashamed of revokes as its disconcerting friend Proteus is of transformations. Of course, Intelligence _is_ rather irresponsible and, one might add, cannot help being so because it is essentially _responsive_. Like the human eye (to which I have compared it) Intelligence turns to whichever side the light comes from, adjusting itself, in discursive, often desultory fashion, to all manner of directions and distances, comparing and measuring with unabashed slovenliness, extracting the qualities which strike it and hastening on to connect them with something it was struck by before. Being thus rapidly responsive, Intelligence may often, I admit, seem _on the pounce_, and more so than politeness warrants. But it can also take its time, poise circling round and round, and reverse its movement, because it is never motionless and always able to readjust its balance.