St. John of Avila, proclaimed a doctor of the Church in October 2012, offers illuminating insights on the Holy Spirit in this collection of homilies. Presented as sermons given around the feasts of Ascension and Pentecost, the saint speaks directly and to the point, yet is thoughtful and affectionate in his style. He proceeds in the form of a dialogue to present the Great Unknown. The sermons begin with a short introduction and then come to a particular point supported by Scripture texts, quotations from the Fathers, well-chosen illustrations, and his own original insights. Paper.