A merry heart maketh a cheerful countenance.

-Bible (Old Testament)
Proverbs15:13.

So let him give; not grudgingly, or of necessity: for God loveth a cheerful giver.

-Bible (NewTestament)
Corinthians 9:7.

To be seventy years young is sometimes far more cheerful and hopeful than to be forty years old.

-Holmes, Oliver Wendell
  Letter to  Julia Ward Howe, 27 May.

Joy shivers in the corner where she knits And Conscience always has the rocking-chair, Cheerful as when she tortured into fits The first cat that was ever killed by Care.

-Robinson, Edwin Arlington
  Dionysus in Doubt,'New England'. distribution  based  on  the  work  of  Keynes.  Her  works  include The  Economics  of  Imperfect  Competition  (1933)  and  Economic Heresies (1971).