Perceiving truth

In the search for truth, one must be careful not to get stuck on a single perception, but rather, must keep an open-mind. I think it's very easy to fall into a certain belief and then reject all things that contradict that belief. Does this inhibit the search for truth? I guess so. If you are focused on one belief you invest more energy in protecting that belief rather than searching for truth. I know I'm rambling again but I realize that I've fallen into such a trap many times. O well, just a thought.