Not of this World is the sixth studio release of the Christian rock band, Petra. It was released in 1983. It is very similar to its predecessor (More Power to Ya), and Bob Hartman has stated that he considers it to be the musical equivalent of a sequel. This album includes some of the group's most popular recordings from the 80s.
The use of keyboards is featured prominently in this album compared to its predecessor, but not nearly to the level as featured on Beat the System.