Augustine and Pelagius were two of the great theologians of the fourth century whose work has an effect on the theology of Christianity today which focuses on the areas of original sin and free will. . Sin can be defined as anything that does not express or conform to the sacredness of God. The question of sin is not in its definition but in its origin. Augustine and Pelagius were two people with two different views on the origin of sin. Pelagius, was a faithful British monk who claimed that we come into the world with free will. This free will allows us to choose to sin or not. Our sin is based on our actions. We are considered Adam before the fall. Augustine asserted that a good and infinite God created only good. The evil that man does comes from the bad decisions he chooses to make. This could be supported by the story of Job where we see that Job decided not to sin despite the circumstances (Job 1:22). Pelagius believed that what Adam did was an isolated event and uniquely independent from the rest of the human race. Yet Augustine believed that what Adam did greatly affected the rest of humanity. We are all involved in the fall of Adam and have been given a sinful nature as a result. Whether we agree with Augustine or Pelagius, we must understand this human's sin and make bad decisions. But it is through God’s grace that we are blessed with renewal and forgiveness and given the opportunity to walk in God’s ways and will. The theology of moral rigorism – Pelagius, focuses on free will and sin. Adam and Eve were created with free and neutral will. They had the ability to make their own choices to be good or bad. They had an obligation to do good. Just as the scripture is in the middle of the paper, understand that humans sin and make bad decisions. But it is through God's grace that we are blessed with renewal and forgiveness and enabled to walk in God's ways and will. In my opinion, Augustine's argument offers great evidence for the need for a savior and the need for the redemption that only Christ can offer. The fall in the garden was not the original sin, according to Augustine, but a baby's original sin is his first individual sin that he commits based on his own choices and free will. It is through God's irresistible grace and redemption that we are restored to the freedom that gives us both the freedom to sin and not to sin. Before we accept God's divine conversion and grace, our passions and irresistible desires lead us to sin. God's grace gives us the control and gauge we need, along with true freedom of choice and free will..