„Well, I know what I have to do, so it is simple. Duty is a wonderful thing. I do not know what I should have done without duty since young Tom died. You could have painted, he told himself. Or you could have done something useful. Maybe, he thought. Duty is simpler.
This is useful, he thought. Do not think against it. It helps to get it over with. That's all we are working for. Christ knows what there is beyond that.“
— Ernest Hemingway, livro Islands in the Stream
Pt. 3: At Sea, Section 15
Islands in the Stream (1970)