Third, prosperity brought hedonism and materialism that undercut the ideals of saintly poverty. Lui defends a worldview based on cynicism, hedonism and materialism. Such ideas, claims Ramanuja, decay to materialism, hedonism and self worship. Its lyrical themes include escapism, liberation, loneliness, hedonism and romance. In such usage, "hedonism" and "puritanism" are antonyms. Various ideologies range from sexual repression to hedonism. Though consistent in their pursuit of happiness, Bentham and Mill's versions of hedonism differ. It was a period of optimism and hedonism, and a cultural revolution. According to Christopher Peterson, "eudaimonia trumps hedonism". Does Christian Hedonism make a god out of pleasure? Libertinism is described as an extreme form of hedonism. Some psychologists explain empathy in terms of psychological hedonism. "Desiring God", where Piper explains his concept of Christian hedonism. MacDonald describes the song as "a spontaneous expression of its author's playful hedonism". This is an extremely strong aversion to hedonism.