She agreed to help him 'out of the goodness of her heart'. [=because she is a kind and generous person]
He finally got a raise. 'Goodness knows' he deserved one. [=he certainly deserved one]
If you cook the vegetables too long, they'll lose all their (natural) 'goodness'.
(..) No. Ask Anna. No, I don't... -Come on,then. -Oh!Look out! This vile, idiotic matchmaking of yours. For goodness' sake, what have I done? Is anything the matter? No. You look as lovely as ever, Princess Kitty. Kitty, it's us next. Princess, I have the honor to claim my dance. (..)2012 Anna Karenina