Imagine this. If you see a picture of a "cake" and a "cockroach" in front of you, which one do you think your eye will go to? Probably most people would go for the "cockroach". Your eyes are drawn to the "cockroach" because of your negative thinking. We humans have lived on hunting for a long time. When we saw a nut which is eatable and a lion which is potentially a life-threatening animal at the same time, we would pay attention to the lion because if we noticed the nut only, the lion would…