This research addresses the evangelical counsels - poverty, chastity, and obedience - in light of their theological foundations, historical development, and contemporary living within the Church. Beginning with their biblical origin and their presence in the early Christian communities, the study examines their diverse forms of expression throughout Tradition, including eremitical and monastic life, mendicant orders, modern renewal movements, and new forms of consecration officially recognized by the Church, such as Secular Institutes and Societies of Apostolic Life. The reflection then deepens with the teaching of the Second Vatican Council, which reaffirms the universality of the call to holiness and highlights the ecclesial value of these counsels for all the faithful. Finally, the monograph explores the ecclesial and missionary dimension of living the evangelical counsels in both religious life and the lay state, emphasizing their role as a prophetic witness in the contemporary world and as a concrete expression of Christian perfection, understood as participation in Trinitarian life.