An Exact Exposition of the Orthodox Faith (De Fide Orthodoxa) · Saint John of Damascus
FideOrth 2.14.1
There are four varieties of pain, viz., anguish, grief, envy, pity. Anguish is pain without utterance: grief is pain that is heavy to bear like a burden: envy is pain over the good fortune of others: pity is pain over the evil fortune of others.