 In Daybreak: Reflections on Moral Prejudices (Morgenröte. Gedanken über die moralischen Vorurteile, 1881), Nietzsche continues writing in his aphoristic style, but he marks a new beginning by accentuating as opposed to pleasure, the importance of the “feeling of power” in his understanding of human, and especially of so-called “moral” behavior. Always having been interested in the nature of health, his emerging references to power stem from his earlier efforts to discover the secret of the ancient Greeks’ outstanding health, which he had regarded as the effects of how “agon” (i.e., competition, one-upmanship, or contest, as conceived in his 1872 essay, “Homer’s Contest”) permeated their cultural attitudes. In this respect, Daybreak contains the seeds of Nietzsche’s doctrine of the “will to power”—a doctrine that appears explicitly for the first time two years later in Thus Spoke Zarathustra (1883–85). Daybreak is also one of Nietzsche’s clearest, intellectually calmest, and most intimate, volumes, providing many social-psychological insights in conjunction with some of his first sustained critical reflections on the cultural relativity at the basis of Christian moral evaluations. In this book—as he remarks retrospectively in Ecce Homo (1888)—Nietzsche begins his “crusade [Feldzug] against morality.”