ecumenism, emphasising charisms over the institution and putting personal experience over the community faith of the Church. The study is not only a presentation of ideas but brings new and inspiring elements to the scientific discussion. It is an original and creative contribution to the theoretical achievements of theology as a discipline of science. The dissertation brings a new name for the Third Divine Person - Communion in the Holy Trinity. Communion reflects the mission of the Holy Spirit which embraces the Church and the sacraments, voices a golden mean between forgetting about the Holy Spirit and the Joachimism of proclaiming the era of the Holy Spirit. The monograph justifies the simultaneous existence of Christology and pneumatology, brings a new perspective on Filioque and is of significance for ecumenism.