"The man . . . must not . . . take also from the tree of life and eat, and live forever." So the Lord God banished him from the Garden of Eden. - Genesis 3:22-23, NIV
Adam and Eve were driven from their garden home, driven from security and safety and serenity and success and satisfaction, separated from God! The loneliness and desperate agony of loss must have been overwhelming. As they looked back, they could see at the entrance to what had been their home a powerful angel standing guard with a sword swirling like a mad dervish, preventing any thought of return. The finality of their separation from all they had been created for must have been devastating.
Since there was only one entrance into the Garden and it was guarded carefully and constantly, it was not just hard to get back into God’s presence-it was impossible! God Himself prevented it. Neither Adam nor Eve, nor you nor I, nor anyone ever born into the human race could ever get back into God’s Presence. The Garden of Eden, God’s heavenly home, can never be regained through human effort. Paradise was lost!
But, praise God! Heaven’s door is opened and paradise regained at the cross!
From God's Story