The course seeks to outline the trajectory of the work of the Holy Spirit from its contemplative beginnings (Church Fathers, Desert Fathers, and Monasticism), through major medieval foundations (e.g., Mendicant, Ignatian, Carmelite), up to contemporary lay charisms. This three-stage development culminates in: today’s engagement with the secular world; the foundational baptismal spirituality with a universal call to holiness; and the ever-deepening awareness of the spousal union with Christ and divine filiation of the Father. The course aims at fostering a concrete encounter with the infinite furnace of God’s Trinitarian love.