The secret of this is that at the bottom of his fugues lies a broadly conceived, well-balanced and firmly constructed harmonic plan. It must be granted, besides, that the subjects out of which he builds them have a singular vitality and are full of suggestion. But Bach, with his fertility in highly charged musical ideas and his apparently unlimited power to weave and ravel and weave musical material in endless variety of effects, rarely let his skill or his enthusiasm betray his sense of proportion. There is a compactness in nearly all his fugues which results from the compression of expressive ideas within the well-defined limits of a logical, harmonic plan. Doubtless, the definiteness of this harmonic plan is more or less concealed from our modern ears by the uninterrupted movement of the voice parts, which was part of the conventional ideal of polyphonic writing. We are used to the pauses or stereotyped repetitions of the more modern style, which throw harmonic goals into prominence whereon the mind may perch and rest for a moment. Such perches are for the most part lacking in the Bach fugues. The subject takes flight and flies without rest until the end. Moreover, the art of playing Bach which brings out more than the regular and mechanical march of the voice-parts is unhappily extremely rare. Evenness of execution, that unhappy _bête-noire_ of the striving student, is exalted far above any really more difficult, subtle variation of touch which may veil the flow of the various independent melodies in order to bring out the beautiful changing harmonies, arising from them like colored mist. But a simple analysis of any fugue will reveal the clear, well-balanced plan underneath it. Pause for a moment at one or two of those that are better known. Take, for example, the fugue in C-sharp major from the first book of the ‘Well-tempered Clavichord.’ There is the conventional opening section, in which the theme and secondary themes are announced. We have tonic, dominant, and a clear cadence again in the tonic. Then begins the strong pull toward the dominant, so nearly inevitable in most kinds of musical form, and finally the dominant triumphant with the main theme strong and clear, and a solid cadence.