"The Truth About Priestly Continence and Celibacy in the Early Church" (Unam Sanctam Catholicam), another thoroughgoing treatment such as we've come to expect from Boniface.
[Hat tip to L.S.]
"What is the first business of philosophy? To part with self-conceit. ...It is impossible for anyone to begin to learn what he thinks he already knows." -- Epictetus (c. 100 A.D.)