  The instanton approach to spontaneous chiral symmetry breaking is reviewed,
with emphasis on the connection to chiral random matrix theory. We extend the
approach to discuss the finite density, zero-temperature behaviour of quark
matter. Since the instanton-induced interactions are attractive in both
$\bar{q}q$ and $qq$ channels, a competition ensues between phases of matter
with condensation in either or both. It results in chiral symmetry restoration
due to the onset of diquark condensation, a `colour superconductor', at finite
density.
