Let there be an SU(5) Yang-Mills theory with all its gauge bosons, let the symmetry be broken down spontaneously, and let all but one of the remaining massless gauge bosons be sold into infrared slavery. That one last gauge boson is my favorite. Let him rush forth to illuminate all of my creations!

Fearful Symmetry, Chapter 14 (p. 232), Macmillan Publishing Company. 1986