Philip was not content with having thus acquired several penitents; but desiring to preserve them, he, like a good father, invented sundry exercises by which they should not only maintain, but keep continually increasing their fervor and advancing in spiritual things. For this end, and considering the hours after dinner as the most dissipated and dangerous part of the day, he arranged that they should come to him in his room at that time; and there he gathered them around him, and had a sort of conference with them. Sometimes he proposed a moral question, as of the beauty of virtue and the deformity of vice . . . In these conversations he made great use of the works of John Cassian, as being full of moral and useful instruction.
(From the Life of St. Philip Neri - edited by Blessed John Henry Newman)