  We use Ward identities of broken scale invariance to infer the amount of
scalar glueball--$\bar{q}q$ meson mixing from the ratio of quark and gluon
condensates in the QCD vacuum. Assuming dominance by a single scalar state, as
suggested by a phase-shift analysis, we find a mixing angle $\gamma \sim
36^{\circ}$, corresponding to near-maximal mixing of the glueball and
$\bar{s}s$ components.
