The answer already given touches on whether what an author writes, is the same as what an author believes.
However, in the specific case of the Rama series, after the first book, it's not so much Arthur C. Clarke writing as it is Gentry Lee. Especially the last of the series, Rama Revealed, was written by Gentry Lee, with Arthur C. Clarke only consulting.
As the Wikipedia article on Gentry Lee reads:
Rendezvous With Rama was written in 1972 and Clarke had no intention of writing a sequel. Lee attempted to turn the Rama series into a more character-driven story following the adventures of Nicole des Jardins Wakefield, who becomes the main character in Rama II, The Garden of Rama and Rama Revealed. When asked, Arthur C. Clarke said that Gentry Lee did the writing while he was a source of ideas.
The source for that seems to be an interview with Arthur C. Clarke by Sci-Fi.com, which can be found on the Internet Archive.
Another important influence on my life, of course, has been Gentry Lee, who was introduced to me by Peter Guber, who wanted to make a film based on Gentry's ideas. It was never filmed, but it led to the novel, Cradle, which was based on our joint ideas but almost entirely written by Gentry. Since then Gentry has collaborated on Rama II and The Garden of Rama, and Rama Revealed, which was written virtually entirely by him, though with consultation with me. I've described our collaboration in the preface, "Co-Authors and Other Nuisances," I think in Rama II.