The pursuit of happiness is a universal human aspiration that transcends cultures, religions, and historical periods. Despite unprecedented advancements in technology, material prosperity, and access to information, many individuals continue to experience dissatisfaction, stress, and a perceived lack of meaning in life. This paradox raises important questions regarding the true nature of happiness and the factors that contribute to enduring well-being. Psychology and spirituality, though often viewed as distinct domains, both attempt to understand human fulfillment and provide pathways toward a meaningful life. While psychology emphasizes emotional regulation, cognitive processes, personal growth, and social relationships, spirituality focuses on self-realization, inner peace, transcendence, and connection with a deeper sense of self. This chapter explores the concept of the Happiness Index through an integrated lens, examining the distinctions between pleasure, happiness, and bliss (Anand), the role of ego and desire in human suffering, and the significance of resilience, self-awareness, and meaning in achieving sustainable well-being. By synthesizing psychological theories and spiritual wisdom, the chapter proposes a holistic framework for understanding authentic happiness.