I think one can decide to protect a belief. You can make efforts to safeguard it from difficult questions.
I think the best anyone can do is to try to bring all of your thoughts and ideas into the examination process. One can choose to do that.
I recall, as I was entering the deconstruction process, deciding that I was going to put all of my beliefs on the table. I didn't do this lightly. I FEARED unbelief.
I remember a discussion I had with a believing friend after I left the faith. He was frustrated with my lack of belief in his god and seemed to take it as a personal insult. In a moment of frustration, he declared, "Well, at LEAST I BELIEVE in something!" He was protecting his belief by defining the state of belief itself as a virtue.
But holding to an idea isn't a virtue. And it is problematic when we give ideas a permanent place in our identity.