An explanation about Sin in the View of Irenaeus

Irenaeus is a church father who introduced a special interpretation of original sin. He believes that creation passes through two stages and man, at the beginning of creation had a weak nature and was at the initial stages of growth and perfection. Despite the teachings of the Word of God, Adam was not perfect when he was in heaven, and the Devil, who was aware of man's weak nature, urged Adam and Eve to disobey God's command. Their eating from the forbidden tree was behind their coming to this world, their attainment of perfection and their similarity to God. Being similar to God is the minor aspect of creation. Death this world is the ascribed to sinfulness and disobedience, the outcome of which is eternal, sinfulness and disobedience. Of course, Adam's sin is the worst kind of sin because it was followed by remorse and repentance. Thus man is favored with God's mercy. Irenaeus considers Christ’s existence as the reason for creation, not as a response to the sin of Adam. In fact, he regards Jesus Christ as the center of universe and the role of Adam is to pave the way for Christ. The unity between Christ and God has restored the friendship which was lost by Adam.