Let me start with a little background on why I’m asking the question:
My fiancee believes that the Christian Bible is entirely true. She acknowledges that some things in it may be metaphor, and translation may have altered the meaning of certain passages, but she feels that the original text at least was divinely inspired, and that every sentence of it contained truth. She can explain to me why she believes this (in terms like “it’s what I was raised to believe”) but can’t really provide any evidence to support this belief.
Even though I’m not really a person of religious faith, I recognize that there are some things I believe without evidence. For instance, I believe that if something has usually proven true in the past, this indicates that it will probably continue to prove true. However, the only reason I can give for believing that statement is that it has usually proven true in the past. Obviously, this is quite circular.
I also believe that the input I receive from my senses corresponds in some way to physical reality. I have absolutely no way of proving this (since any way I could try to prove it would necessarily rely on my senses). Yet I still believe it to be true, despite the lack of evidence. Moreover, I’d say almost everyone believes this, or at least they behave as if they do, even if intellectually they acknowledge other possibilities.
So, my question is, are all these beliefs equally reasonable? Is there any sort of rule we ought to follow in deciding what is reasonable to believe without evidence? Or is every belief equally reasonable?