What we believe shapes how we live, whether our beliefs are superficial or profound. The narrative we choose opens up certain possibilities and closes off others; it shapes what we can see and what we are blind to. But most important, the narrative we choose points to and defines that which we most deeply aspire to. Every narrative is shaped in one way or another by hope. If you live with a materialistic narrative, your longing focuses on materialistic goals; if a spiritual narrative, spiritual goals.
Is it possible to say one set of beliefs is better than another? I think it is. Reality is real, whatever our beliefs about it, and the more our belief model aligns with reality, the 'truer' our experience. So belief shapes our experience. The richer our experience, the richer our beliefs, and the reverse is true. The richer and more complex our beliefs, the richer and deeper our experience. Good beliefs create the condition for a richer experience, evermore aligned with deeper levels of the Real; bad beliefs create the conditions for a poorer, more constricted experience of the Real. (Source)
What you think you know is in fact only in the final analysis what you believe because of what for most are unexamined presuppositions. No matter how "facts-based" you think you are, your facts are meaningful only insofar as they fit within an interpretive frame that is shaped by your metaphysics, whether you are aware of having a metaphysics or not. So be careful about what your metaphysics is, because insofar as it provides an interpretive frame that translates reality into knowledge, it might be filtering huge swaths of reality that would otherwise enrich your life if you had a metaphysics that allowed for richer possibilities.