"Right after this they usually make a belief out of it."
gets to the heart of the matter about the inherent problem in maintaining beliefs. Perspective on what is "fact" is subjective. Beliefs are not fact. Even what is commonly accepted as proven fact remains subject to change based on further evidence.
from Antony deMello's
The Way to Love
"Look into yourself and examine your reactions to persons and situations, and you will be appalled to discover the prejudiced thinking behind your reactions. It is almost never the concrete reality of this person or that thing you are responding to. You are responding to ideologies, belief systems, economic, political, religious, psychological belief systems, to preconceived ideas and prejudices, whether positve or negative. Take them one at a time, each person and thing and situation and search for your bias separating the reality here before you from your programmed perceptions and your projections. And this exercise will afford you a revelation as divine as any that the Scriptures could provide you with."
Of course we're all free to agree to disagree, though I think continually remaining open to look at all sides of everything is the better option. Always with full respect, of course, that's understood.