Chapter 9.— 21.  Petilianus said:  "Hemmed in, therefore, by these offenses, you cannot be a true bishop." 22.  Augustin answered:  By what offenses?  What have you shown?  What have you proved?  And if you have proved charges on the part of I know not whom, what has that to do with the seed of Abraham, in which all the nations of the earth are blessed?