  I discuss recent work done with Gerry Brown on chiral phase transition at
high temperature and/or density described in terms of Georgi's vector limit.
The notion of ``mended symmetry" is suggested to play an important role in
understanding the properties of hadrons in dense and/or hot matter before
reaching the phase transition. It is shown that while the QCD vacuum in
baryon-free space is resistant to ``melting" up to the critical temperature,
baryon-rich medium can induce the vacuum to become softer in temperature: the
hadron masses drop faster in temperature when baryon matter is present.
