This study aims to analyze, through religious hymns in the German-speaking area from the early 18th century, the influence that the Pietist theological movement, starting from Philipp Jacob Spener's Pia Desideria, had on the centralization of the self in the Protestant religious world, through the introduction of personal feelings of love towards God. On the one hand, the origins of Pietism can already be traced back to the late 16th century in areas affected by the radical reforms of the Anabaptists. On the other hand, it is from the late 17th century and throughout the 18th century that this theological and spiritual movement destabilized orthodox Lutheranism in some symbolic cities of Protestant Germany, such as Frankfurt am Main, Halle, and the Duchy of Westphalia, up to Moravia. The extensive publication of hymnals and musical compendia for the use of individuals, lay groups (collegia pietatis), faith communities, and churches denotes a fervor and a desire to preach their way of "practicing" spirituality, which greatly contrasts with both orthodox Lutheranism and the prevailing rationalism in the religious and philosophical sphere in Germany of the mid-18th century. For the first time since the Reformation, Lutheranism saw the use, in the theology of the preached and sung Word, of personal feelings and emotions that connect the individual with God, who is made an object of individual as well as collective worship. This was one of the most significant accusations that came from the University of Wittenberg against Pietism, namely the shift of theological and spiritual focus from the centrality of God to the centrality of the self, which manifests its faith through the most intimate emotions and feelings. Through the analysis of some examples taken from hymnographic and theological production, centered on the individual feelings of the believer, this article focuses on how this influenced the religious revival movements that would pervade England and the United States of America for more than two centuries (from the First Great Awakening in the late 18th century to the Pentecostal movements of the 20th century), with a spotlight on Italian hymnody during the Risorgimento. [ABSTRACT FROM AUTHOR]