Following some brief involvement with Marxism in 1939, Parsons converted to Thelema, the new religious movement founded by the English occultist Aleister Crowley.
On 2 July 1505, while Luther was returning to university on horseback following a trip home, a lightning bolt struck near him during a thunderstorm. He later told his father that he was terrified of death and divine judgment, and he cried out, “Help! Saint Anna, I will become a monk!” He came to view his cry for help as a vow that he could never break.