As she explained in a Harvard Business Review Ideacast, if you believe some people are born good leaders and some are not, at the first sign that you are not a good leader, you will give up. But, she notes, there are now decades of research proving that this is a false construct. Abilities like creativity and leadership can be developed.
Maybe some barriers can’t be overcome, but believing they can increases the likelihood that you can make it so. That’s something to keep in mind the next time you’re handed what seems like an impossible security challenge.