sentences:  He tried to interest his friends and acquaintances in Thelema, taking science fiction writers Jack Williamson and Cleve Cartmill to a performance of The Gnostic Mass.Although they were unimpressed, Parsons was more successful with Grady Louis McMurtry, a young Caltech student he had befriended, as well as McMurtry's fiancée Claire Palmer, and Helen's sister Sara "Betty" Northrup.Jack and Helen were initiated into the Agape Lodge, the renamed Church of Thelema, in February 1941.