One of the best ways to improve in an area is to be willing to go back over the things in that area that we believe to be true. In short, be willing to question the things we believe. If you are correct in your position you will reinforce the belief. And if any modification in your belief system might be useful, this process will show you what the modification might be.
When we were 18 months old there were many things that didn't bother us that would at this point in life would embarrass us. Not looking for change assumes that we are not only correct but there can be no improvement. By questioning some of our favored positions we run the risk of growing and becoming more effective in life.