“Habit of seeing opposites — The general imprecise way of observing sees everywhere in nature opposites (as, e.g., “warm and cold”) where there are, not opposites, but differences of degree. This bad habit has led us into wanting to comprehend and analyze the inner world, too, the spiritual-moral world, in terms of such opposites. An unspeakable amount of painfulness, arrogance, harshness, estrangement, frigidity has entered into human feelings because we think we see opposites instead of transitions.”

— Friedrich Nietzsche, Human, All Too Human: A Book for Free Spirits, Volume II, Part 2, § 67.