When the Lord God Almighty told Adam and Eve that he would remedy their problem, so that they once again could have the indwelling Holy Spirit Of God, they probably had difficulty believing that humanity would ever again have oneness with God. They probably had difficulty believing that God could forgive the multiplying sins.
But God found a way to pay the penalty for every sin that has ever been committed. He paid it with the blood of Jesus. He paid it in full for every human being who has ever lived, and who will ever live. He paid it for you.