The final part of starting points for reading science fiction with religious themes.
The Chaplain’s War – Brad R. Torgersen (2014)
This is effectively military science fiction in a similar vein to Joe Haldeman’s The Forever War (1974), Keith Laumer’s Bolo universe (1976-2010), Robert Heinlein’s Starship Troopers (1959), and Jack Campbell’s The Lost Fleet (2006-2010) series.
Here the protagonist is not a super soldier, but rather an chaplain’s assistant who has to prevent humanity’s extermination through argument and by possessing religious faith.
There’s a more in-depth review here at Faith and work science fiction? The Chaplain’s War by Brad Torgerson.
The Cosmic/Space Trilogy – C.S. Lewis (1938-1945)
One of the most famous series of theological science fiction, Lewis’ series consists of the three novels below exploring good and evil: