We are born complex. We do have selfish impulses, but we also want approval and acceptance from parents and others around us. Nor do we need to be purified, cleansed, or in any way made perfect. We do not need to apologize for who we are or for the things we've done. Psychologists overwhelmingly reject religious models of human morality, and with good reason.
Geneticists overwhelmingly reject biblical creation theories.
They find that we have a strong family relationship with primates, particularly the chimpanzee. The fact that our genes are almost identical with the chimps is confirmed by numerous labs using far more reliable tests than even a creationist judge would need to conclusively prove a paternity case in court. When ministers make claims like these, and then add that it's sinful even to doubt these claims, it's your responsibility to stand up for yourself and doubt them anyway. Religions abuse your mind and your heart. You must have the courage to doubt yours.