  We consider here the vacuum structure in QCD with both quark and gluon
condensates and a variational ansatz for the ground state. The method is
nonperturbative using only equal time algebra for the field operators. We then
find that a constrained energy minimisation of the Hamiltonian leads to a QCD
vacuum with both quark and gluon condensates for $\alpha_s > \alpha_c=0.62$.
Pion decay constant and the charge radius of the pion seem to fix the QCD
coupling constant $\alpha_s$ as 1.28. The approach opens up possibilities of
relating the mysterious vacuum structure with common place hadronic properties.
