Man and the Natural World Quotes in A Wizard of Earthsea

How we cite our quotes: (Chapter.Paragraph)

Quote #10

On the course on which they were embarked, the saying of the least spell might change chance and move the balance of power and of doom: for they went now toward the very center of that balance, toward the place where light and darkness meet. Those who travel thus say no word carelessly. (10.1)

Notice that the question of balance and spells often takes for granted the idea that spells may interfere with the Balance. But why couldn't it be the other way? Would it be possible to imagine this section written as if spells were important to maintaining the Balance?