There is an old saying that goes, “He who knows only his side of the case, knows little of that.” To be able to critically think and examine any issue requires that a person should admit the fact that his opinion may be false, or at least not as precise as it could be.
When you are open to hearing the critiques or anger of other people toward your ideas and opinions, you open yourself to being forced to question and examine what you believe and improve.
A belief that is not grounded in some deep conviction is a belief that will give way to the slightest resistance or argument to the contrary. If an ungrounded belief is actually the truth, but the person who believes it can’t explain it, that is a belief held by faith. In some things faith is understandable, but in many things, we have faith in things that are little more than superstitions.