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.
I believe that the books and stories we fall in love with make us who we are, or, not to claim too much, the beloved tale becomes a part of the way in which we understand things and make judgments and choices in our daily lives. A book may cease to speak to us as we grow older, and our feeling for it will fade. Or we may suddenly, as our lives shape and hopefully increase our understanding, be able to appreciate a book we dismissed earlier; we may suddenly be able to hear its music, to be enraptured by its song.