Why is the resurrection good news?

The 45th question of the Heidelberg Catechism asks: "What does the 'resurrection' of Christ profit us?" and answers: "First, by his resurrection he has overcome death, that he might make us partakers of that righteousness which he had purchased for us by his death; secondly, we are also by his power raised up to a new life; and lastly, the resurrection of Christ is a sure pledge of our blessed resurrection."