The work God does for us is to make us able to be around Him again. Remember what that incident in the Garden of Eden was all about: God gave our ancestors the choice to keep Him as God, or to eat that super-smart fruit and make little gods out of themselves. They chose to be their own little gods, and we have suffered the consequences ever since.
What are the consequences? Death, of course (Genesis 2:16-17; Romans 6:23). It means just what you think – the end of your life. It also means something worse – your separation from God forever. You see, when Adam and Eve disobeyed God, He had no choice but to throw them out of His Garden. There can never be any more than one God anywhere, but they had decided to set themselves up as rival gods. To keep from destroying them, He had to get them out of His presence (away from Him).