  Quantum Chromodynamics (QCD) is a firmly established part of the Standard
Model, yet its long distance properties remain challenging at a conceptual
level. In recent years significant experimental and theoretical progress has
been made towards a field theoretic understanding of hadrons as QCD bound
states, addressing the complex properties of relativistic bound states in a
gluon condensate with spontaneously broken chiral symmetry. In this
introductory talk I give a personal view of some of the issues involved:
Measuring hadron matrix elements, understanding their QCD dynamics and
explaining the apparently close relationship between hard and soft processes.
