Closer to this book and equally illuminating are the many problems triggered
by a sound or a picture. Only afterwards is a formula devised, and then
proclamed....
---Benoit B. Mandelbrot
Multifractals and 1/f noise: Wild self-affinity in
physics (1963--1976), Selecta Volume N, Selected Works of Benoit B. Mandelbrot,
Springer-Verlag, New York, 1999, page 9.