There are many quotes by Benoît Mandelbrot, but there's one quote I like the most:
"One hope for regularity but one lives in roughness."
Benoît Mandelbrot did critical work in topics such as fat tails and fractals.
I'll go back and read : "The (Mis)behavior of Markets: A Fractal View of Risk, Ruin, and Reward"
A Panorama of Fractals and Their Uses :