Why is the fall of Adam important for understanding human nature?

The fall of Adam is foundational in understanding human nature within the framework of Reformed theology. It reveals that through Adam’s disobedience, sin entered the world, affecting all of humanity (Romans 5:12). This event illustrates the concept of original sin, where all people are seen as inheritors of Adam's sinful nature, resulting in a deep-seated corruption that influences our wills and actions. The consequence of the fall clarifies our need for divine grace and redemption. Ephesians 2:1 talks about being dead in trespasses and sins, indicating that apart from God's intervening grace, we cannot choose to follow Him or seek righteousness. Therefore, the fall underscores the necessity of Christ’s atoning work, making the doctrine of grace critical to understanding salvation.