The dead were judged according to what they had done as recorded in the books. The sea gave up the dead that were in it, and death and Hades gave up the dead that were in them, and each person was judged according to what he had done. Finally, in all of the theological explanations in Romans, there is a statement, which also supports this idea of works being the key part to salvation. For if you live according to the sinful nature, you will die. Therefore it is concluded that these works, being bad, are what cause eternal damnation.
Works are the driving force.
Tying all of this together, the conclusion brings itself out in the case for works. Many scriptures support this idea that works is the key to Christianity. Even Jesus seems to support this in His teachings, seen in the gospels. Obviously, how we live our daily lives, the things we do that is what determines our faith. If faith without works is dead, then faith with works is living.