Are beliefs separate from knowledge? In my time as an apologist, I've heard
many people try to dismiss beliefs as silly or meaningless while claiming to only rest in knowleldge.
Usually, it's voiced something like "Well, you may
rely on your beliefs, but I rely on facts like those that science gives." But
this kind of separation make a crucial mistake. You see, beliefs are necessary
for knowledge to exist.
First, we must understand that beliefs in and of
themselves don't normally exist without any precursor. We don't make things up
out of thin air and then say we believe them. For example, imagine we're sitting
in a house of a friend. I cannot ask you to believe that there is a Rodent of
Unusual Size in the next room just because it would be fun to believe in such a
thing. You wouldn't really believe the claim. Even if I offered you a $1 million
prize for believing in the ROUS and you tell me you believe, I don't think you
really hold that the claim is true—you just assent to the claim to get the
money.
However, if I provide some background for my claim (e.g. our friend's
father is a bio-chemist working on the effects of growth hormone on rats and he
uses the next room as a laboratory) your beliefs may change. You have some
additional information that supplements your belief and it gives further
justification for you to actually believe the claim. Therefore, your beliefs
become established on prior evidence or they have some other justification
attached to them.
Most beliefs work this way. It is very rare that
someone believes in something with no prior background or reasoning at all.
Humans are rational creatures and it's in our nature to seek some kind of
support for our beliefs. When that support is sufficiently justified and
the belief is true, we can say that we have knowledge. That's how knowledge is
defined; knowledge is only possessed if someone has a belief that is both
justified and true.
Beliefs and Knowledge
Realize not all beliefs, even with justification, are true beliefs. For
example, one can make the claim that if you run for several miles daily, you
will lose weight. The person begins running and, sure enough, he loses weight.
Do his beliefs count as knowledge? Not necessarily, since it depends on what the
belief is. When you ask why he believes that running causes one to lose weight
he may say, "I believe that running every day is performing an exorcism of the
fat-demons. When you run, they are expelled and they can't catch up to you. So
you lose weight." So, while his claim does in fact prove to be true, he does
lose weight, his justification for the claim is lacking and he doesn't know that
he will lose weight.
There are many beliefs that science holds where the
claims produce a true response. Quantum theories produce some very good, highly
accurate predictive results. But we don't yet know that these quantum theories
are correct. We simply know they give us an accurate outcome. Like the
runner who loses weight, the reason why he loses weight may be wrong, even
though the end result is just as he predicted. There are several different and
competing quantum theories; which demonstrates that we simply don't know.
It's not knowledge yet.
So, to separate the concept of knowledge
and belief into different realms is, I think, itself unwarranted. Yes,
some beliefs are less justified than others. But beliefs are a necessary
requirement for knowledge. Without a belief you cannot know anything. And this
shows that just because a belief happens to be a scientific belief, it is not
necessarily any more justified than any other.