"One of my friends whom I hold in high esteem admitted to me the other day that when he wants to work nowadays … he has to turn on his radio. The droning of the loudspeaker—so he says—puts him in a favorable frame of mind and ideas pour out. I cannot help but thinking that this is not the act of a true musician. For thought has a rhythm of its own, which must either clash with the rhythm from outside and lose energy, or else submit to the outer impulse in restless slavery."