Spherical: What a wonderful word. “Spherical, magical, shimmering, kaleidoscopic, spectral.” These were my associations. Only when researching this piece did I notice that “sphere” derives from the Greek “hull” or “ball.” It was used in antiquity to designate the firmament, imagined as a hollow sphere. Pythagoras assumed that the movements of the spheres or heavenly bodies created tones with pitches depending on their distances and velocities. Then I came across a text by Stefan Zweig, which, b...