Can a dead person be used to serve God?
According to Paul that because of God's great mercy we are to offer ourselves as "living sacrifices" in Romans 12:1 Therefore, I urge you, brothers and sisters, in view of God’s mercy, to offer your bodies as a living sacrifice, holy and pleasing to God—this is your true and proper worship.
God has called all believers to "die to self" and find new life in Christ. A sacrificial life is one focused on doing life God's way according to His plans and purposes.
Romans 12:2 challenges us to, Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is —his good, pleasing and perfect will.
Be changed in to the man or woman of God that follows and obeys His Word.
Be wise today and always - live for Christ by dying to self.