  An approximate technique for performing nonperturbative calculations in
quantum SU(3) gauge theory is presented. One aspect of this nonperturbative
method is the breaking down $SU(3) \to SU(2) + coset$. The procedure also uses
some aspects of an old method by Heisenberg to calculate the n-point Green's
function of strongly interacting, non-linear fields. Using these ideas we give
approximate calculations of the 2 and 4-points Green's functions.
