A while back I lost hearing in one ear. I made an appointment with my doctor and suggested the problem might be sinus pressure. He corrected me: my problem was earwax. After the physician removed the blockage, my hearing instantly returned.
But a strange thing happened: I was now hearing all sorts of things. When I walked, I could hear the fabric of my pants rubbing. I heard birds and trucks and high frequency noises that I didn’t remember hearing before. After a few days, my experience returned to normal and I heard just as I had before.
What happened? The answer is that my mind selectively targeted what to focus upon and what to blot out. It did this by habit.
Let me share two major advantages of habits, routines, and unwritten rules.