While writing on previous topic of Schadenfreude, found the word Mudita. Never heard of it before, just as Schadenfreude. Did some research on it.
Mudita means finding joy in the happiness and success of others, has not received sufficient attention either in expositions of Buddhist ethics, or in the meditative development of the four sublime states (brahma-vihara [brahma-vihaara]), of which mudita is one.
It is relatively easier for man to feel compassion or friendliness in situations which demand them, than to cherish a spontaneous feeling of shared joy, outside a narrow circle of one’s family and friends. It mostly requires a deliberate effort to identify oneself with the joys and successes of others. Yet the capacity of doing so has psychological roots in man’s nature which may be even deeper that his compassionate responses. There is firstly the fact that people do like to feel happy (with — or without — good reason) and would prefer it to the shared sadness of compassion. Man’s gregarious nature (his “sociability”) already gives him some familiarity with shared emotions and shared pleasure, though mostly on a much lower level than that of our present concern.
Surely WMSM is with all their values without this one of Mudita! Or more specifically it is true for themselves, not for others, which is the core of it.