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'.
(..) And... (GRUNTS) Erik. These. Yeah. Those. Thank goodness. Erik. Yes? It's, uh, Darcy. Darcy. So good to see you. (..)2013 Thor: The Dark World