+The relationship between Catholic dogmatic and moral teaching and the personal spiritual life of the believer;
+The Eucharist and the Sacraments in the spiritual life;
+Mariology and, in particular, the mystery of Mary's spiritual motherhood in the life of the Church;
+Classics of the Western Spiritual Tradition
+Father Miller serves as Spiritual Director of The College Seminary of the Immaculate Conception at St. Andrew's Hall.
- S.T.D., Pontifical University of St. Thomas Aquinas, Rome
- M.A. Institute for Advanced Studies in Catholic Doctrine, St. John's University, Jamaica, NY
- B.A., Seton Hall University
- "The Grace of Ars" published in 2010 by Ignatius Press.
- "The Trial of Faith of St. Therese of Lisieux" published in 1997 by Alba House.
- Numerous articles in various journals such as Communio, Marian Studies the Downside Review, Homiletic and Pastoral Review