"that God raised Jesus from the dead" This is no such thing as zombies.
I believe that we are saved by the blood of Jesus Christ and by faith with the confessing of our mouth and believing in our hearts that God raised Jesus from the dead(Rom. 10:9-10). I believe that when he died it was the finished! But after we acknowledge all of this, we must learn to live a life of HOLINESS! We must learn to work on our minds and our hearts and learn to bring our flesh under subjection to the things that would displease God. When we are saved we should live out of what we know and not so much what we feel. I believe that if we onced served the Lord and then we turn away from him at some point and not return or repent then yes I believe that we are hell bound and there is a two fold puishment for those who once serve the lord in hell. BLESSINGS!