We should note that all of these places of thermal extremes (Finnish saunas, Japanese hot baths, American beaches and mountains) have their opposites close at hand. There are possibly two reasons for having the extremes right next to each other.
The first is physiological: the availability of extremes ensures that we can move from one to the other to maintain a thermal balance.
The second might be termed aesthetic: the experience of each extreme is made more acute by contrast to the other.
Works of art which have great life often have intense contrast within: rough/smooth, solid/void, loud/silent, empty/full. It is the difference between opposites which gives birth to something. Contrast is what often gives other principles their degree of life – the intensity of the boundary, the markedness of the alternating repetition.
Contrast strengthens centers by making each a deeper entity of itself, and thereby giving deeper meaning to both. It is, at its simplest, what allows us to differentiate. But meaningless contrast remains meaningless. It is only when centers are actively, mutually, and meaningfully composed that it acts to deepen the whole.
Should we really demand that the guy who checks ticket stubs at the movie theater hones his craft?
Well, yes. No job is too low to not warrant care, because no job exists in isolation. Carelessness ripples. It adds friction to the working of the world. To phone it in or run out the clock, regardless of how alone and impotent you might feel in your work, is to commit an especially tragic—for being so preventable—brand of public sin.
Bob [the driving instructor] oozes concern; he wants to infect the state of New Jersey with good driving habits. He respects his public role, the fact that the minute he's done with these kids they head straight for their parents' car keys and out onto the roads we share. When I asked him what he likes to do outside of work, he laughed: "This is my life."