To hear Scrooge expending all the earnestness of his nature on such subjects, in a most extraordinary voice between laughing and crying; and to see his heightened and excited face; would have been a surprise to his business friends in the city, indeed.
"A merry Christmas, Bob!" said Scrooge, with an earnestness that could not be mistaken, as he clapped him on the back.
There are no more uses of "earnest" in the book.
Show samples from other sources
Both sides were deeply in earnest, even passionate.
She has a casual, go-with-the-flow personality and doesn’t appreciate his earnestness.