Although English is my first and only language, I've always wondered why religious texts are preceded by "the", although they really can just be seen as pieces of literature (I'd rather not get into religion). Say I'm reading Fahrenheit 451 by Ray Bradbury, I wouldn't say,
I've been reading the Fahrenheit 451 a lot recently.
I would say,
I've been reading Fahrenheit 451 a lot recently.
But when I'm saying I'm reading a religious text, you have to put the in front of the religious text, otherwise it would sound incorrect (I'd say grammatically but I'm no grammar professional). It seems like putting the in front of a religious text is making it more/a higher version of a proper noun compared to other pieces of literature, if that makes any sense.
Why does this occur?
Edit: Just by the way, Fahrenheit 451 was just an example. Also, I don't mean that they included the article the in the title, I meant that why do we call it that since they're not explicitly in the title itself(i.e., written on the cover)