Superman only became a good guy after Joe Shuster got involved.
The entire Luthor clan is already known for its faith in self-reliance and distrust of seemingly divine beings.
Of course, this theory (caught by a ComicBook.com staffer) could be nothing.
There are plenty of other Nietzsche quotes that could’ve delivered the same message, but Luthor specifically went the Superman/Overman route, which seems a little too on the nose to be coincidental.