Muditā is rejoicing in others’ good fortune, the antidote to envy. It is the third of the brahmavihāras, cultivated like the others by extending it to all beings. Teachers often note it is the hardest of the four to practise wholeheartedly.
Muditā
Sympathetic joy: gladness at the happiness and success of others, the third divine abode.
Also: Mudita, sympathetic joy