Hi Valarie,

hhyc> What are the 4 States of Mind in Pali? I know Metta is "loving
hhyc> kindness", but what of compassion, vicarious joy & equanimity?

compassion - karu.naa;
vicarious (empathetic) joy - muditaa;
equanimity - upekkhaa.

These four are termed 'brahma vihaaraa' or 'divine abidings'.

Metta,
Dimitry