  In a style of popular article, we discuss models of hadronic structure and
their relation with models of the QCD vacuum and lattice simulations. Borrowing
two main characters from G.Gamow, Mr.Thompson and Professor, we make a travel
in the QCD vacuum. Instanton-generated interaction between quarks appear to be
major player, they create quark condensate, constituent quark masses and their
bound states with properties very close to those observed. Direct removal of
perturbative and confining forces (possible on the lattice by ``cooling'')
result in very small modification of hadrons. Phase transitions at high T and
large number of quarks in the theory are discussed.
