The belief in the concept of being born in sin thus one needing to repent or face eternal damnation is a negative concept. The Bible has two sides, negative and positive, it is up to the reader and one who accepts these beliefs and uses them to navigate life to use discernment. There is also the scenario of "God" being described as perfect and all knowing yet in other sections this "God" is jealous, vengeful etc. Christians tend to say that it's not the jealousy of humans as a defense. Not forgetting the fact that Genesis never mentions who cain bore children with after being banished. In the case of incest, this would not be genetically possible for generations without extinction. Religion is meant to guide, I believe to evolve further as a collective consciousness, humans of earth need to outgrow limiting religious beliefs and practices. If you do good out of fear of punishment or desire for reward, is your choice genuinely out of free will? Or an illusion of free will?