I've actually thought very little about solo work up until just very recently. Most of it is because in my band, Incubus, it is very much a collaborative effort. I do what I do in the band, and everyone plays their respective parts, but in the end, we are sort of a democratic process.
[Max Planck] was one of the finest people I have ever known. . . but he really didn't understand physics, [because] during the eclipse of 1919 he stayed up all night to see if it would confirm the bending of light by the gravitational field. If he had really understood [general relativity], he would have gone to bed the way I did