If I were not a physicist, I would probably be a musician. I often think in music. I live my daydreams in music. I see my life in terms of music. … I cannot tell if I would have done any creative work of importance in music, but I do know that I get most joy in life out of my violin.
Source:'What Life Means to Einstein: An Interview by George Sylvester Viereck,' The Saturday Evening Post (October 26, 1929)