5113. The reason is from no other source than the affection of love, which is full-sounding, as may likewise be manifest from harmonics and music. When these express the higher things of love, as love to God, then, also, there will be a full sound; and when, too, they mark some devout sentiment concerning God, there is, as it were, the bass. But when other things are concerned, then the sounds vary in a different manner; so that they agree, respectively, with the melody.