  Once upon a time, the picture of hadrons was of mesons made of a quark and an
antiquark, and baryons of three quarks. Though hadrons heavier than the ground
states inevitably decay by the strong interaction, the successes of the quark
model might suggest their decays are a mere perturbation. However, Eef van
Beveren, whose career we celebrate here, recognised that decays are an integral
part of the life of a hadron. The channels into which they decay are often
essential for their very existence. These hold the secrets of strong coupling
QCD and teach us the way quarks really build hadrons.
