His purpose is to restore in the hearts of the readers the joy of the Spirit, by making them see that Christ fulfils every need.
Oedipus fulfils an ancient prophecy in killing his father; he is the blind instrument in the hands of fate.
This depicts the journey of the soul from heaven to earth, its life in the body, and its final return to the heavenly home, under the figure of a Parthian prince who is sent from the court of his parents to the land of Egypt to fetch the serpent-guarded pearl; after a time of sloth and forgetfulness he fulfils his quest, and returns triumphant and again puts on the heavenly robe.
In the territoires du commandant the mixed commune is presided over by a military officer who fulfils the duties of mayor.
There remains, then, only one religion which can be used as an explanation, namely the Persian, which in fact fulfils all the necessary conditions.