On the Uposatha, Tahn Pamutto gives a reflection on the brahma-vihara of Mudita. This mind state translates as ‘Gladness’ or ‘Sympathetic Joy’, and is based on a deep joy and appreciation in good fortune, wholesomeness, and success.
Often overlooked because it seems too simplistic or doesn’t directly combat ill-will like the other brahma-vihara’s, it is in fact a very subtle and powerful state based on a deep sense of contentment and selflessness.