This second volume of Collected Essays, Systematic Mariology, contains Peter Damian Fehlner's essays on several central Marian topics and disputes. Written over the span of more than twenty years, these essays represent Fehlner's most complete studies on the question of Mary's participation with Christ in the redemption, her role with the Holy Spirit in the mediation of grace, and her place in the sacramental economy, flowing from the Eucharist. Fehlner provides theological resolutions to these inquiries by establishing Mary's predestination as the Immaculate Mother of God and Spouse of the Holy Spirit in the eternal plan of the Father. This flowers into a theological vision of the divine missions that is Trinitarian, christological, and pneumatological. This triple viewpoint opens upon a theological account of divine action and perfect creaturely re-action because it is framed within an ecclesiology that decodes Mary's virginal and divine maternity as the "Great Sign" of the perfection and promise of the church through Christ her spouse in the love of the Holy Spirit.