Catholicism is a main focus of Brideshead Revisited. From hurried pre-wedding conversions to dinner-table debates on dogma, religion dominates the novel’s thematic focus. Every character struggles with religion in one way or another, even the agnostic central character. The one concept everyone seems to agree on is that to be holy is to suffer. In accordance with this principle, the most religious characters in the novel choose to suffer to be closer to God. Waugh explained that his intention was for every character to accept divine grace in his own way, though critics disagree on whether the novel ultimately reads for or against Catholicism.
Religion tore Sebastian and Charles apart, yet drove Julia and Charles together.
Religion prevents Charles from ever being close to any of the Flyte children.