But in fact Christ has been raised from the dead, the firstfruits of those who have fallen asleep.  For as by a man came death, by a man has come also the resurrection of the dead.  For as in Adam all die, so also in Christ shall all be made alive.  But each in his own order: Christ the firstfruits, then at his coming those who belong to Christ. 1 Cor. 15:20-23 (ESV)
In Adam all die. All who die, die in Adam, as a result of Adams sin, which is our sin. By one man came death This is original sin, death is the ultimate proof of original sin. Christ came to remedy death, he did so by dying in our place, and giving us baptism by which we are buried and raised to the newness of life in Him, incorporated into his death and resurrection. I sometimes wonder about parents who don’t baptize their children. They worry about their children, they watch them at the pool, make sure they are safe at school. Why? Because they know death is always an immanent possibility. But the ultimate cause of death is sin. We die in Adam, we die in his sin. Should their children drown in the pool, or be hit by a car on the way home from school, they die in Adam. In baptism we are incorporated to Christ, we become his, we are given his life. Why would a parent who is worried about his child at the pool, not then guarantee his child’s life with the promises and grace of Christ given in baptism? These very clear promises:
 And Peter said to them, "Repent and be baptized every one of you in the name of Jesus Christ for the forgiveness of your sins, and you will receive the gift of the Holy Spirit.  For the promise is for you and for your children and for all who are far off, everyone whom the Lord our God calls to himself." Acts 2:38-39 (ESV)
 We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life. Romans 6:4 (ESV)
 having been buried with him in baptism, in which you were also raised with him through faith in the powerful working of God, who raised him from the dead. Col. 2:12 (ESV)
 Baptism, which corresponds to this, now saves you, not as a removal of dirt from the body but as an appeal to God for a good conscience, through the resurrection of Jesus Christ, 1 Peter 3:21 (ESV)
I wonder do they themselves believe in Christ? Do they themselves not trust the one who rose from the dead, to do what he promises to do, in the way that he promises? Infant mortality is a sad fact of life, the death of a Child is a tragedy, but Christ has given us an answer. And those of us baptized into Christ, belong to him, and when he comes he will raise us from the dead, we have nothing to fear. Peter himself has told us that the promise is for our Children, so then by what right do we deny it to them? What comfort a parent has knowing their Child even of three hours, younger even, belongs to Christ, having been given life in baptism.