It's the same with the law of sin. The power of His Spirit in us counteracts the death tendency, giving us power to do what is right in the sight of God. While becoming a Christian does not initiate immortality, it does produce power over the death-producing influences that are all around us. This is one of the most important elements of Christian doctrine - there is life after death. The body formerly doomed to die, the mortal body, will be given new life.
Death then is no longer a grave, an ending, but rather a doorway, a beginning.
The religion of materialistic atheism believes in total extinction - when you die, you're dead. You simply cease to exist. The religion of hedonism believes that now is all you get, so enjoy life to the full, for this is all there is - eat drink and be merry. There are others who seem to believe that when you die, you become a free floating disembodied spirit roaming the earth, spooking unsuspecting believers in ghosts. But Christians believe in the immediate transportation of the spirit into the presence of the Lord, and the subsequent resurrection of the body.