A merry heart maketh a cheerful countenance. -- Old Testament

Related:

• He that is of a merry heart hath a continual feast
  Old Testament -- Proverbs xv,...
• Hope deferred maketh the heart sick. -- Old Testament
  Proverbs xiii,...
• A merry heart doeth good like a medicine. -- Old Testament
  Proverbs xvii,...
• A wise son maketh a glad father. -- Old Testament
  Proverbs x,...
• Wine that maketh glad the heart of man. -- Old Testament
  Psalm civ,...
• There is a lion in the way; a lion is in the streets
  Old Testament -- Proverbs xxvi,...
• He that maketh haste to be rich shall not be innocent
  Old Testament -- Proverbs xxviii,...
• Iron sharpeneth iron; so a man sharpeneth the countenance of his friend
  Old Testament -- Proverbs xxvii,...
• A word spoken in due season, how good is it! -- Old Testament
  Proverbs xv,...