Deep optimism in George Macdonald's children's book "At the Back of the North Wind" (1871), in Chapter XV when young protagonist Diamond vows to be joyful:

Diamond's father and mother were, notwithstanding, rather miserable, and Diamond began to feel a kind of darkness beginning to spread over his own mind. But the same moment he said to himself, "This will never do. I can't give in to this. I've been to the back of the north wind. Things go right there, and so I must try to get things to go right here. I've got to fight the miserable things. They shan't make me miserable if I can help it." I do not mean that he thought these very words. They are perhaps too grown-up for him to have thought, but they represent the kind of thing that was in his heart and his head. And when heart and head go together, nothing can stand before them.

"What nice bread and butter this is!" said Diamond ...

^z - 2020-07-04