There are many unanswered questions in this world. Although it seems shocking that we, as human beings, cannot answer all the mysteries in the world, it is actually these mysteries that make us happy. People shouldn't be able to explain every aspect of life; if we could, we would be a painfully tired species. Ambiguity is what makes the world go round. Without unanswered questions there would be no research. What is NASA without darkness? When puzzles perplex us, we turn to our imagination. The mind is the gateway to a world with only answers, or whatever an individual chooses. People may have control of their imaginations, but not their brains. Daniel Gilbert, in “Immune to Reality”, explains his theory on the psychological immune system of the brain. This, basically, is a person's defense system against the terrible things in life. When something goes wrong, the brain automatically begins to look for positive views of the situation, “and as we have seen, the human brain is an intelligent shopper” (Gilbert 216). Instead of remaining unhappy, the brain allows a person to rationalize a situation and move on with their life. Likewise, the brain allows unfortunate people to make the best of their condition. Sacks's memoirists, in his essay “The Mind's Eye: What the Blind See,” find ways to realize their full potential in life, even after being blinded. They use their imagination in such a way that they feel no different from anyone else. Jenkins' essay, "Why Heather Can Write: Media Literacy and the Harry Potter Wars," exemplifies how people use mystery in literature to create an enjoyable hobby, which is fan fiction. Writing fan fiction gives children and adults the opportunity to come up with answers to every puzzle... in the middle of a sheet of paper... in just a few hours, and we'll solve every amazing mystery in the universe. The brain routinely softens each situation for an individual so that they can move on with their life to other circumstances. Imagination is the part of the brain that every individual controls. They use this imagination to create a world that satisfies them. When someone encounters darkness they mechanically look for an explanation. If an explanation cannot be found, a person will use their imagination to come up with an answer, even if it is not the right one. Even if we think an explanation will make us happy, it is the mystery and the search for an answer that keeps us in good spirits. In short, people have no idea what they need. Sacks and Jenkins demonstrate how the mind's eye helps people in life, but Gilbert shows that it is mystery and imagination that make people happy.