לֵ֣ב שָׂ֭מֵחַ יֵיטִ֣ב גֵּהָ֑ה וְר֥וּחַ נְ֝כֵאָ֗ה תְּיַבֶּשׁ־גָּֽרֶם׃
O coração alegre serve de bom remédio; mas o espírito abatido seca os ossos.
Rashi on Proverbs
A happy heart enhances one’s brilliance Heb. גהה. When a person is satisfied with his lot, his countenance shines.