I recognise in the deepest tones of harmony, in the bass, the lowest grades of the objectification of will, unorganised nature, the mass of the planet. It is well known that all the high notes which are easily sounded, and die away more quickly, are produced by the vibration in their vicinity of the deep bass-notes. When, also, the low notes sound, the high notes always sound faintly, and it is a law of harmony that only those high notes may accompany a bass-note which actually already sound along with it of themselves (its _sons harmoniques_) on account of its vibration. This is analogous to the fact that the whole of the bodies and organisations of nature must be regarded as having come into existence through gradual development out of the mass of the planet; this is both their supporter and their source, and the same relation subsists between the high notes and the bass. There is a limit of depth, below which no sound is audible. This corresponds to the fact that no matter can be perceived without form and quality, _i.e._, without the manifestation of a force which cannot be further explained, in which an Idea expresses itself, and, more generally, that no matter can be entirely without will. Thus, as a certain pitch is inseparable from the note as such, so a certain grade of the manifestation of will is inseparable from matter. Bass is thus, for us, in harmony what unorganised nature, the crudest mass, upon which all rests, and from which everything originates and develops, is in the world. Now, further, in the whole of the complemental parts which make up the harmony between the bass and the leading voice singing the melody, I recognise the whole gradation of the Ideas in which the will objectifies itself. Those nearer to the bass are the lower of these grades, the still unorganised, but yet manifold phenomenal things; the higher represent to me the world of plants and beasts. The definite intervals of the scale are parallel to the definite grades of the objectification of will, the definite species in nature. The departure from the arithmetical correctness of the intervals, through some temperament, or produced by the key selected, is analogous to the departure of the individual from the type of the species. Indeed, even the impure discords, which give no definite interval, may be compared to the monstrous abortions produced by beasts of two species, or by man and beast. But to all these bass and complemental parts which make up the _harmony_ there is wanting that connected progress which belongs only to the high voice singing the melody, and it alone moves quickly and lightly in modulations and runs, while all these others have only a slower movement without a connection in each part for itself. The deep bass moves most slowly, the representative of the crudest mass. Its rising and falling occurs only by large intervals, in thirds, fourths, fifths, never by _one_ tone, unless it is a base inverted by double counterpoint. This