DEUT493 The word mussar itself means "correction" or "instruction" (And sometimes the even stronger "rebuke" or "reproof" or "reproach." It appears first in [this verse] and occurs many times in the Bible) and also serves as the simple modern Hebrew word for "ethics." But Mussar is most accurately described as a way of life. It shines light on the causes of suffering and shows us how to realize our highest spiritual potential, including an everyday experience infused with happiness, trust, and love.