The Eleventh Sin Is To Live In Fear. It is a sin to live in fear because we have not created a society that is peaceful. It is okay to feel fear. Fear is a feeling like all our other feelings and like our other feelings, we have to learn how to feel fear but do what we need to do anyway. The goal of life is to be happy. Living in fear, being with people who make us scared and being in fearful situations is never happiness.