Confirmation (Ephesians 1:13) is not water baptism. It is a related but separate sacrament.
for more verses on Confirmation, see
http://www.scripturecatholic.com/confirmation.html
It is St. Paul who wrote, when we are baptized we die to Christ. That is we go down into the water just as Jesus went down to the tomb, and all previous sin is washed away.
This is how the Blood of Christ works for our salvation. Just as Christ arose from the dead, we arise again as a new creature who has been born again of water
and of the Spirit.
It is not water that cleanses sins. It is through the grace of God which is received through the Sacrament of Baptism that cleanses our sins.
It is in this way that the water baptism is symbolic of the spiritual baptism that is taking place at the same time through the receiving of sanctifying grace.
We renew our Baptismal promises on the following occasions:
- when we received the Sacrament of Confirmation;
2)At the Easter Vigil and on Easter Sunday service;
- When we attend the Baptism of friends and relatives.
Even though we renew our Baptismal promises on those occasions there is no need for us to go through a second Baptism, because we have that indelible mark upon our souls that has already made us the sons and daughters of God. 1John 5: 5-7 Romans 6: 5-11; 13-14 Gal 3: 23-29 Ephesians 2:7-10; 4: 5-6 Colssians 2: 11-13
"In union with Christ we have imitated his death, we shall also imitate him in his resurrection. We must recognize that our former selves have been crucified with him to destroy this sinful body and to free us from the slavery of sin. When a man dies of course, he has finished with sin.
But we believe that having died with Christ we shall return to life with him; Christ, as we know, having been raised from the dead will never die again. Death has no power over him any more. When he died, he died once for all, to sin, so his life now is life with God; and in that way you too must consider yourselves to be dead to sin but alive for God in Christ Jesus." (Romans 6: 5-11)
“Before faith came, we were allowed no freedom by the Law; we were being looked after till faith was revealed. The Law was to be our guardian until the Christ came and we could be justified by faith. Now that that time has come we are no longer under that guardian, and you are, all of you, sons of God through faith in Christ Jesus. All baptised in Christ, you have all clothed yourselves in Christ and there are no more distinctions between Jew and Greek, slave and free, male and female, but all of your are one in Christ Jesus.” (Gal 3: 23-29)
"But God loved us with so much love that he was generous with his mercy; when we were dead through our sins, he brought us to life with Christ - it is through grace that you have been saved and raised us up with him and gave us a place with him in heaven, in Christ Jesus.
This was to show for all ages to come, through his goodness towards us in Christ Jesus, how infinitely rich he is in grace. Because it is by grace that you have been saved, through faith; not by anything of your own, but by a gift from God…" (Ephesians 2:7-10)
“There is one Lord, one faith, one Baptism and one God who is Father of all, over all, through all and within all.” (Ephesisans 4: 5-6)
"In him you have been circumcised, with a circumcision not performed by human hand, but by the complete stripping of your body of flesh. This is circumcision according to Christ.
You have been buried with him, when you were baptised; and by baptism too you have been raised up with him through your belief in the power of God who raised him from the dead.
You were dead because you were sinners and had not been circumcised; he has brought you to life with him, he has forgiven us all our sins" (Colssians 2: 11-13)
The Sacrament of Baptism leaves on the soul an indelible mark which shows that all who have been baptised are the sons and daughters of God. This mark can never be removed from the soul. But that does not mean that we cannot lose grace because of our future sins.
Here is a question for you. If the Catholic Church is wrong on baptism, why does she accept most Protestant baptisms as valid?