This fourth volume of St. Thomas Aquinas’s opuscula brings together those works of Aquinas that show him in his capacity as both a talented preacher and a loving spiritual master. For the first time, all of Aquinas’s prayers, hymns, sermons, and sermon fragments have been gathered together into one volume whose contents are an invaluable service to both devotion and contemplation. Also included in the volume are the two offices of Corpus Christi, with both the texts and music indicated by Aquinas for the feast established in 1264: Aquinas’s selections of music and texts from Scripture and Church Doctors provide rich fruit for contemplation and reveal a Saint with a deep knowledge and love of the Word in the Sacrament and in the Scriptures.