What details suggest that Kino and Juana are good people who live in harmony with their world?

In the beginning of the story, Kino and his family move with the rhythms of nature. They go to sleep when it is dark and wake with the light. The sounds of night and day are familiar and calming. Kino hears the Song of the Family: both look at each other and at their child with love. They are in harmony with their world and feel contented.