“The Holy Mysteries in Orthodoxy: Healing and Life in Christ Through the Holy Spirit” offers a theological and systematic perspective on the place and significance of the Holy Mysteries in the tradition and life of the Orthodox Church, highlighting their role in the spiritual life of the faithful. The Holy Mysteries are sanctifying acts through which believers are initiated into the Christian life, are spiritually strengthened, and unite more deeply with Christ and the Church, through the work of the Holy Spirit. By participating in the Mysteries, believers express and renew their commitment to God, community, and the life of faith. In a world marked by suffering and alienation, the Holy Mysteries are offered as sources of healing and new life in Christ. They are, in their essence, sacred and mysterious encounters with God, moments in which heaven and earth intersect, and in which believers are called to communion with God. In addition to the theological and scriptural discussion, the work also addresses the practical and experiential dimension of the Mysteries, emphasizing how they are lived by the faithful in the liturgical and communal context of the Church.