" Through difficult calculations of merciless precision that call upon the full power of modern computer technology, they've shown that unbendable equations of high symmetry account convincingly and in quantitative detail for the existence of protons and neutrons, and for their properties. They've demonstrated the origin of the proton's mass, and thereby the lioness's share of our mass. I believe this is one of the greatest scientific achievements of all time. "

― Frank Wilczek , The Lightness of Being: Mass, Ether, and the Unification of Forces