same as what Helen Keller tried to convey in Three Days to See. Just as Helen Keller said "The seeing see little" ,we can also say "The hearing hear little"
That's to say, people with the ability to hear are casual in using their ears and don't listen attentively to nature, to others and even to themselves. In addition, modern technology makes communication easier. However, our busy modern life makes listening the missing half of communication. What we learn from this video is that people with the ability to hear should be appreciative of the gift and listen attentively in communication because listening creates wonders.