There are as many contradictions between Wagner\'s theory and practice, indeed, as between his life and his art. Without attempting the impossible task of trying to reconcile them all, let us cast a rapid glance over the main features of his practice, which are far more important than his theory. From every side we are driven to the conclusion that the dominating force in him was the instrumental musician who was born to continue Beethoven\'s work in another sphere. As his powers developed, his music becomes more symphonic,[390] and he intuitively shapes his poems so as to allow the freest possible play to the symphonic succession and interweaving of themes. The characters serve to make the course of the story clear, and to give precision to the emotions that are being expressed by the orchestra. He saw in Beethoven\'s later works a colossal effort to make music free. Logic of some kind there must be in every piece of music. This logic depends fundamentally upon showing the inter-relation of each part of the music by the recurrence of significant themes; and broadly speaking there are only two ways of achieving this—by way of pattern or by way of poetry. At bottom all form, all logic, in music, in fiction, in drama, in architecture, in sculpture, is one in object and process; a coherent whole has to be made out of parts, and the parts have to justify their existence by showing themselves indispensable to the whole. Pattern form and poetic form embrace between them every mode of structure of which music is capable. Sometimes a piece of music leans markedly to the one or the other; but in the vast majority of cases the actual form is a union of the two, or a compromise between them. It was a compromise of this kind that Wagner detected in some of the greatest works of Beethoven; the form that had been evolved mainly with reference to pattern was being applied, with only partial success, to music the prime impulse of which was poetic—however vague this poetry might be, however incapable of expression in words. But while pattern form pure and simple tells its own story and is its own justification, poetic form needs to be explained and justified by the poetic idea that is at the root of it. Go beyond Beethoven, says Wagner, in the expression of poetic emotion, and your form will become so free that the hearer will no longer be able to see it in terms of the old pattern logic, and the music will seem to him formless and incoherent. You can only win the full freedom you need for the expression of definite as distinguished from indefinite emotion by telling the hearer the nature and the source of this emotion. As Wagner put it, poetic music in pattern form always prompts the question "Why?" The symphonic-poem writer answers with his programme: Wagner answered with the characters and the action of the programme set visibly before us on a stage. There is no such fundamental ?sthetic difference between the two methods as Wagner imagined; the differences are only in detail.[391]

The curious thing is that, for all his theories, Wagner himself now and then wrote instrumental pieces that prompt a "Why?" as emphatically as anything of Beethoven\'s. He despised what he called the "quadrature musicians"—the composers who take refuge in phrases cut to a regulation length and pattern and worked-out in a stereotyped four-square form. Music meant little or nothing to him unless it spoke directly of humanity and to humanity. No theme must be invented for mere invention\'s sake, or worked-out for the mere sake of working-out; it must spring into being as the expression of an overwhelming human need or of some blinding vision, and must answer in all its changes to the changing life of the man or mood it painted. It was this inevitableness of idea and of form that he admired in Beethoven and missed in Brahms. His inability to compromise on the matter made him contemptuously sweep out of existence most of the music of his day. It was precisely in this broadening of the Beethovenian spirit and design, and the making them capable of expressing every emotion that mankind can feel, that he opened out such enormous possibilities in music.

The ordinary "abstract" composer\'s mind must have been a pure puzzle to a man like him, who could not understand how modern music could have any raison d\'être apart from something definitely poetic or pictorial to be expressed. To invent a theme for its own abstract sake, to pare and shape it till it was "workable," and then to weave it along with others of the same kind into a pattern of which the main lines were predetermined for him by tradition—this was something he could not imagine himself doing, and that he scoffed at when he found the Conservatoire musician engaged in it. "I simply cannot compose at all," he said once, "when nothing occurs to me."[392] He must always have a definite subject, which was to determine the nature, of the theme and control the whole course of the development. Looking back through the music of the generation that has followed him, we can see how penetrating his vision was in all questions of expression and form. Beethoven\'s innovations, he points out, were mostly in the field of rhythmic distribution, not that of harmonic modulation. Rhythmic changes of all kinds come naturally within the scope of the ordinary symphonic movement, which is in essence an ideal dance; but startling melodic or harmonic changes, or attempted subtleties of form, generally prompt that awkward question "Why?" and leave it unanswered. Take, for example, the efforts that have been made in our own day to unify the four-movement sonata form by the carrying over of themes from one movement to another, as in César Franck\'s violin and pianoforte sonata. Attach a poetic significance to a theme, and its recurrence in another movement explains itself; but in a piece of ostensibly abstract music the recurrence simply puzzles us. No satisfactory answer can be given—except in terms of a programme—to the question why a theme that has apparently served its purpose should be resuscitated by the composer at a later stage, in preference to the invention of a fresh theme. For every effect the composer makes, the logician in us insists upon knowing the cause. Hence the soundness of Wagner\'s advice to the modern composer—Do not consciously aim at harmonic and instrumental effects, but wait till there is a sufficient cause for them.[393] His own practice was a model of restraint: not one modulation, not one subtilisation of the harmony, not one addition to the orchestral weight without a thoroughly good reason, rooted in the nature of the idea itself. "In the instrumental prelude to the Rhinegold, for instance," he says, "it was impossible for me to quit the fundamental note, for there was no reason whatever for changing it. A great part of the not unanimated theme that follows between Alberich and the Rhine Maidens permitted of modulation only to the most closely related keys, since passion still expresses itself here in its most primitive na?veté."[394] The rule he would enforce upon pupils is this, "Never leave a key so long as what you have to say can still be said in it." And only when the emotion becomes more complex must the harmony be coloured more subtly to correspond. This, he lays it down, constitutes the great difference between the symphonic and the dramatic development of themes. In the former the effect is meant to be kaleidoscopic; and a real master can work wonders in the arabesque-like combination and transformation of simple material. But do what he will he cannot venture upon the variety of the dramatic composer, for if he goes beyond a certain point of audacity or singularity he ceases to be intelligible in terms of pure music. "Neither a mere play of counte............