  Spontaneous chiral symmetry breaking, mesons and baryons are illustrated in
the language of the Dirac theory. Various forces acting between quarks inside
baryons are discussed. I explain why the naive quark models typically
overestimate pentaquark masses by some 500 MeV and why in the fully
relativistic approach to baryons pentaquarks turn out to be light. I discuss
briefly why it can be easier to produce pentaquarks at low than at high
energies.
