  We develop the theory of fermion induced phononlike excitations of the
instanton liquid. It suggests a mechanism of current quark mass generation
which is easily understandable by calculating the corresponding functional
integral in the tadpole approximation. We systematically study the quark
condensate excitations influenced by the phononlike modes and rederive the
relation Gell-Mann-Oakes-Renner with realistic pion mass. The picture of
$\sigma$-meson as being mixed with the soft scalar glueball-like excitation is
discussed.
