“‘And the cause of my further serious interest in the laws of vibrations was the following: “‘Once the Sheikh of our monastery called me to him and said: “‘”Hadji! In the monastery where I was still an ordinary dervish, whenever during certain mysteries our musician dervishes played the melodies of the sacred canticles, all of us dervishes always experienced from these melodies of the sacred canticles particular sensations corresponding to the text of the given sacred canticle. BTG XLI

“‘”But here during my long and careful observations, I have never yet noticed any particular effect on our brother dervishes from these same sacred canticles. BTG XLI

“‘Just then in the street near my window, a wandering dervish began to chant his sacred canticles. BTG XLI

Meanwhile all those present knelt down on one knee, while the angels and cherubim began to sing the appropriate sacred canticles. BTG XLVII