(Myself not excluded.)
Here's a useful exercise. When was the last time you both recognized and admitted you were wrong about something you cared deeply about? Nobody is right all the time. And we're all willing to admit we're not perfect when our imperfections benefit us, like when we need an excuse for mistakes or misbehavior for example ("hey, nobody's perfect"). But why then, if we so readily recognize that we're not perfect, is it so difficult to recognize when we are wrong about something?
I think it's important to approach every conversation with the assumption that our own positions--yes, even our most precious opinions and beliefs--could be flawed, or completely wrong altogether. That doesn't mean you give them up without a fight; it does mean laying them on the line and putting them to the test. If it turns out they are wrong, then we can relieve ourselves of them and be better off for it. If we remain convinced that they are correct however, that conviction will grow even stronger.
There can be no "trial of faith" with no trial.