Grace and Flourishing: Integrating Rahner’s Theology of Grace With Positive Psychology for a Holistic Theology of Happiness

Abstract In recent decades, positive psychology, focusing on enhancing individuals’ well-being, has emerged as a significant field within psychology. Research continues to show that cases of anxiety, depression, loneliness, and other mental health challenges are rising globally, with very few able to access treatment and support. These point to, among other things, a cultural deficit in both fulfillment and a sense of community. This paper examines happiness from a Christian perspective, integrating theological insights with contemporary empirical psychological research. Drawing on Karl Rahner’s theology of grace, this perspective highlights the theological foundation of happiness in God’s self-communication, thereby enabling human transcendence and fulfillment. At the same time, empirical research in positive psychology demonstrates that certain intentional practices, such as cultivating a life of gratitude, building healthy social support, developing effective coping skills, practicing a form of spirituality, and engaging in self-care, significantly enhance subjective well-being. By bringing these two fields into conversation, the article demonstrates that happiness is not just psychological fulfillment but participation in a deeper reality of hope, love, and meaning. The result is a framework for pastoral care and psychological research, along with a treatment approach that addresses the complexities of modern-day living, thereby enhancing individual well-being and fostering a more compassionate society.