The concept of spirituality - a buzzword with great diversity of meaning - is specifically defined in this book from a Christian perspective, emerging from a phenomenological approach to the spiritual experiences of people throughout the centuries. Through selected examples from various epochs, a multifaceted picture of the expressions of Christian faith is presented from a historical perspective. The theological reflection on this practice of piety addresses the conditions and possibilities of contemporary experiences with the sacred, the central importance of the ability to discern spirits, and the relationship between justification and sanctification as the foundation and goal of Christian life. The requirements of spiritual counseling are considered, as well as the problem of spiritual struggles. Finally, methods and media of Christian spirituality are discussed exemplarily.