What does the Bible say about the fall of Adam and Eve?

In Genesis 3, we read about the pivotal moment when Adam and Eve disobey God's command and eat from the forbidden tree. This act of disobedience brought about not only their spiritual death and the corruption of human nature but also the fall of all humanity into sin. The immediacy of their spiritual death is evidenced by their realization of their nakedness and their attempts to hide from God, indicating that their fellowship with Him was severed. This event set into motion God's redemptive plan, which He had already ordained before the foundation of the world (Revelation 13:8).