To survive from day to day and grow, we need to learn. It's a fundamental principle that helps us get up in the morning and handle the world.
With learning, once we believe we know what we are doing (that good old chestnut...'conscious competence'), we then move on to learn about something else; while 'unconscious competence' takes over in that recently learned area.
The irony and trap of learning is the fact that to do something extraordinary we need to unlearn. Picasso's famous quote sums it up... "It took me four years to paint like Raphael, but a lifetime to paint like a child".
Pick something that you believe is critically important to you or to the business you work for. Something that you are highly competent in, and see where you get to by trying to unlearn all the rules and guidelines around it. Interesting exercise.