"I know it's a cunning, treacherous enemy." - Dr. Seuss Pi says fear not only grows with experience but also confidence, and that we should never fear failure because it is an important ingredient for success. He also says that fear can be useful if used properly. For example, he says that fear can keep us alive because it makes us do things such as running away from danger or hiding from predators. Fear can also help us survive by making us act accordingly to circumstances such as when someone is chasing us we will run away because we are afraid they will catch up to us. Additionally, Pi says that fear is natural and necessary for survival. We need fear to protect ourselves from dangerous animals and situations. Without fear, humans would be vulnerable to attacks from predators and would not be able to cope with challenges in our environment which could lead to death. Finally, Pi says that fear is the main source of anxiety in life. Anxiety without fear is meaningless. Without fear, there would be no reason to be anxious about anything. All in all, fear is a part of life that is helpful for survival.