Describe St. John's spiritual life

In Volume III, Chapter IV, we find that Jane sees St. John as an extremely detached figure. He is generally reserved and brooding on the few occasions that she sees him. However, one day, Jane hears him preach in his church, and his stern Calvinist oration about predestination has a profound, thrilling effect on her, although it leaves her saddened. Despite his eloquence, she feels he has not "found that peace of God which passeth all understanding" anymore than Jane has.