We are emerging from a period of consolidation in particle physics. Its gre
at, historic achievement was to establish the Theory of Matter. This Theory
will serve as our description of ordinary matter under ordinary conditions
- allowing for an extremely liberal definition of "ordinary" - for the for
eseeable future. Yet there are many indications, ranging from the numerical
to the semimystical, that a new fertile period lies before us. We will dis
cover compelling evidence for the unification of fundamental forces and for
new quantum dimensions (low-energy supersymmetry). We will identify new fo
rms of matter, which dominate the mass density of the Universe. We will ach
ieve much better fundamental understanding of the behavior of matter in ext
reme astrophysical and cosmological environments. Lying beyond these expect
ations, we can identify deep questions that seem to call for ideas outside
our present grasp. And there is still plenty of room for surprises.