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.
The demand for “originality”—with the implication that the reminiscence of other writers is a sin against originality and a defect in the work—is a recent one and would have seemed quite ludicrous to poets of the Augustan Age, or of Shakespeare’s time. The traditional view is that each new work should be a fresh focus of power through which former streams of beauty, emotion, and reflection are directed. This view is adopted, and perhaps carried to excess, by writers like T. S. Eliot, some of whose poems are a close web of quotations and adaptations, chosen for their associative value, or like James Joyce, who makes great use of the associative value of sounds and syllables.