In more simple words, we might say everything in the universe is trying to become every other thing; and every condition of everything is trying to become every other condition. A hot iron, for example, will strive to become as cool as its environment, and the cool environment will strive to become as hot as the hot iron. They compromise and find an equilibrium between the two, which is neither the one thing nor the other. This conspicuous fact is one of the most characteristic traits of Nature.