How often do we not see this! Natures whose various parts have rambled asunder, or have come to live, like strangers in an inn, casually, promiscuously, each refusing to be his brother's keeper: instincts of kindliness at various ends, unconnected, unable to coalesce and conquer; thoughts separated from their kind, incapable of application; and, in consequence, strange superficial comradeships, shoulder-rubbings of true and false, good and evil, become indifferent to one another, incapable of looking each other in the face, careless, unblushing. Nay, worse. For lack of all word of command, of all higher control, hostile tendencies accommodating themselves to reign alternate, sharing the individual in distinct halves, till he becomes like unto that hero of Gautier's witch story, who was a pious priest one-half of the twenty-four hours and a wicked libertine the other: all power of selection, of reaction gone in this passive endurance of conflicting tendencies; all identity gone, save a mere feeble outsider looking on at the alternations of intentions and lapses, of good and bad. And the soul of such a person--if, indeed, we can speak of one soul or one person where there exists no unity--becomes like a jangle of notes belonging to different tonalities, alternating and mingling in hideous confusion for lack of a clear thread of melody, a consistent system of harmony, to select, reject, and keep all things in place. Melody, harmony: the two great halves of the most purely aesthetic of all arts, symbolise, as we might expect, the two great forces of life: consecutiveness and congruity, under their different names of intention, fitness, selection, adaptation. These are what make the human soul like a conquering army, a fleet freighted with riches, a band of priests celebrating a rite. And this is what art, by no paltry formula, but by the indelible teaching of habit, of requirement, and expectation become part of our very fibre--this is what art can teach to those who will receive its highest lesson. VI. Those who can receive that lesson, that is to say, those in whom it can expand and ramify to the fulness and complexity which is its very essence. For it happens frequently enough that we learn only a portion of this truth, which by this means is distorted into error. We accept the aesthetic instinct as a great force of Nature; but, instead of acknowledging it as our master, as one of the great lords of life, of whom Emerson spoke, we try to make it our servant. We attempt to get congruity between the details of our everyday existence, and refuse to seek for congruity between ourselves and the life which is greater than ours.