“For just as through the disobedience of the one man, the many were made sinners, so also through the obedience of the one man the many will be made righteous.” (Romans 5:19)
Adam famously disobeyed God’s one rule not to eat from the tree of the knowledge of good and evil. We are all descendants of Adam, and like our ultimate father we all continue to disobey God. The Bible calls that sin.
Yet, God sent Jesus as a second Adam, a new humanity. In contrast to Adam, Jesus obeyed. Now, we have a choice of which humanity we want to belong to. The disobedient one founded by Adam or the obedient one launched by Christ, through whom we can be made righteous in God’s sight.