418. The former verse treated of celestial things which are of love, but this verse treats of spiritual things which are of faith, and these are expressed by the "harp and organ." That by stringed instruments, such as harps and the like, are signified the spiritual things of faith, is evident from many considerations. Similar instruments, and also the singing, in the worship of the representative church, represented nothing else, and it was on this account that there were so many singers and musicians, the cause of this representation being that all heavenly joy produces gladness of heart, which was expressed by singing, and in the next place by stringed instruments that emulated and exalted the singing. Every affection of the heart is attended with this: that it produces singing, and consequently what is connected with singing. The affection of the heart is celestial, but the consequent singing is spiritual. That singing and that which resembles it denote what is spiritual, has been evident to me from the angelic choirs, which are of two kinds, celestial and spiritual. The spiritual choirs are easily distinguished from the celestial by their vibrant singing tone [sono canoro alato], comparable to the sound of stringed instruments, of which, by the Divine mercy of the Lord, we shall speak hereafter. The most ancient people referred what was celestial to the province of the heart, and what was spiritual to that of the lungs, and consequently to whatever pertains to the lungs, as do the singing voice and things like it, and therefore the voices or sounds of such instruments. The ground of this was not merely that the heart and lungs represent a kind of marriage, like that of love and faith, but also because the celestial angels belong to the province of the heart, and the spiritual angels to that of the lungs. That such things are meant in the passage before us, may also be known from the fact that this is the Word of the Lord, and that it would be destitute of life if nothing more were implied than that Jubal was the father of such as play upon the harp and the organ; nor is it of any use to anyone to know this.