It's not the "beliefs" that are working for them. It's their faith.
I don't care about belief. Belief is just the presumption that what we think is true, is actually true. And people think all sorts of things are true that they can't actually know to be so. Most belief us just ignorant hubris. Faith is different. Faith is based on our hope that something is true. Not that our blind presumptions that it is. Faith is honest. And that's why it's often much more effective.
Okay, now I understand what you meant by belief, which is not what I meant.
I think you are referring to belief in the context of definitions 2 and 3 below. I am talking about belief in the context of definitions 1 and 4 below.
belief
1. something
believed; an opinion or conviction: a belief that the earth is flat.
2. confidence in the truth or existence of something not immediately susceptible to rigorous proof: a statement unworthy of belief.
3. confidence; faith; trust: a child's belief in his parents.
4. a religious tenet or tenets; religious creed or faith: the Christian belief.
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In that sense I agree. It is not our confidence that something is actually true, it is their faith, which is based on our hope that something is true, since what we believe cannot be proven to be true. If our beliefs could be proven to be true they would be facts, not beliefs.
So, for the Baha'is, it is our
faith in what we believe that is working for us.