Belief indicates an understanding of the options. When you believe in one thing, do you truly understand what you are eliminating from your realm of possibility?
For an example, you can choose to believe that the Earth is round, or that it is not. You can believe that water is not wet and that birds do not fly. You can believe anything you wish.
If you chose to believe that water was not wet, you would have to redefine what it means to be wet, and then give a name to what water is when you touch it, and what happens to you when you are removed from it. It does not change the process of water molecules clinging to you and being cohesive with each other (water is sticky, you might say.) You simply believe that it is something else. Magic, perhaps.
Or you could believe that a god adheres small amounts of water to you, making you believe that you are wet when in fact you are not.
In order to understand that what you believe is referred to as wet, as being when water adheres to you and the objects around you and permeates to a certain degree the fabrics and pores, you dismiss the possibility that it is magic or any other explanation.
The same goes for everything else. We create our beliefs based upon what others believe, and together we create a system upon which society and interactions are built.
I believe that in general most people will argue with me, many of them ignoring the more salient points.