Can I change the definite article in the following sentence and remain grammatical?
Once you adopt the belief that there's nothing you can do to change something, you start to take a pernicious poison into your system.
I might mean that of all the beliefs someone might adopt you adopt one of them. On this assumption, I might say ''There's a belief that there's nothing you can do etc.'' On the other hand, there might be only one belief that there's nothing you can do: the belief. If I can, what's the principle by which a native speaker chooses between the two? Thanks!