491. Once again I heard hymnists, or those singing the praise of our Savior. In fact, a number of choirs were heard singing at the same time about a variety of subjects, by means of visual displays and mental imagery. And yet they are one chorus, consisting of very many, and acting at the same time as one, without any confusion from each other, so that one was in the other, or inside of the other, even outside of the other. In this way the whole angelic heaven customarily devotes itself to the praise and glory of the Savior. This is why musical harmony and singing is so delicious to the heavenly ones when the thoughts of a person on earth are concordant with their ideas. I have often experienced in churches, that the heavenly choirs have joined in, with a very deep sense of gladness, unbelievable, and thus unutterable, to anyone. 1748, the 21st day of January.