What Biblical word with the water?
The holy and life-giving Gospel, the same word which the Apostle mentions in Romans 10:17. There is only one life-giving word that God speaks to us, and it's the Good News of Jesus Christ. The other word, that of the Law, does not give life, it does not save, but condemns us as sinners.
But you have set Peter against Paul, who teaches that salvation is through faith, not by works (Eph 2:8-9), such as baptism.
The text of 1 Pe 3:20-21 reads: ". . .the longsuffering of God waited in the days of Noah, an ark being prepared in which a few, this is eight souls, were quite saved through water. Which figure also now saves us, that is baptism, not a putting away of the filth of the flesh, but an answer of a good conscience toward God through the resurrection of Jesus Christ."
Oh, heaven forbid! I am not setting Scripture against Scripture, neither Peter against Paul, nor Paul against Paul. For Paul himself clearly teaches us that baptism saves, for he has written that all who are baptized are baptized into Christ's death, having been buried with Him by baptism, and raised together to new life with Christ (Romans 6:3-4).
Baptism isn't a work we do, baptism is the work of God.
When a preacher proclaims the Gospel and God works faith in the hearer, do you call that works? Or do you confess freely that God has worked through His own means? That a human being spoke the word doesn't change the fact that it is God's word; for here is the work of God: To give faith, to create faith, to forgive us all our sins, and impute the righteousness of Jesus Christ.
I consider your claim to be a false charge. I am presenting the clear and unified witness of Holy Scripture: That God works through His own Means of Grace, Word and Sacrament.
When you consider the grammatical construction of Peter's context above in Noah and the ark,
baptism is a figure/symbol of the water which saved eight people in the ark, where the
flood is a figure of baptism, in that in both instances, the water that spoke of judgment (in the flood, the death of the wicked; in baptism, the death of Christ and the believer, Ro 6:2-4) is the water that saves; while
baptism is a figure of salvation, in that it depicts Christ's death, burial and resurrection and our identification with him in these experiences.
"Also now saves us," in the context of the rest of the NT, means saved by what baptism symbolizes--Christ's death and resurrection (Ro 6:2-4).
This using of the symbol to refer to the reality is, as I understand it, what the Catholic church calls "sacramental union."
"answer of a good conscience toward God" is a commitment on the part of the believer in all good conscience to make sure that what baptism symbolizes in Ro 6:2-4 will become a reality in his life.
And now we have Peter and Paul in agreement in the truth of the matter, and not set against each other in untruth.
Grammatically the ark/flood are the symbol which prefigure baptism.
ὃ καὶ ἡμᾶς ἀντίτυπον νῦν σῴζει βάπτισμα οὐ σαρκὸς ἀπόθεσις ῥύπου ἀλλὰ συνειδήσεως ἀγαθῆς ἐπερώτημα εἰς θεόν δι᾽ ἀναστάσεως Ἰησοῦ Χριστοῦ
"And the antitype of this* now saves us, even baptism, not the putting away of dirt from the flesh, but the answer of good conscience before God by Jesus Christ's resurrection"
*
this being the ark which saved the eight souls through the water of the flood. It is the type, baptism the antitype. So that even as the ark, through water, saved the eight (Noah and his family), so now does baptism (which likewise is through water), now save us. Not as though it were merely like a bath which cleans dirt off the skin; rather it is the answer, the pledge, of a good conscience before God, toward God, on the basis, by the power of, the resurrection of our Lord Jesus.
If baptism were just water, then it would merely be a cleaning of dirty from the skin, like any other bath or shower. But it's not merely water, but water connected to and comprehended with God's word, as St. Paul has said in Ephesians 5:26. For this reason, this baptism now saves us; for all who have been baptized into Christ have put on Christ (Galatians 3:27), all who have been baptized have been buried with Christ, baptized into His death, and now been raised up, given new life, with Christ--alive with Him who rose from the dead (Romans 6:3-4, Colossians 2:12-13). So we have, as the Apostle says to Titus, been washed with the washing of regeneration and the renewal of the Holy Spirit, not by works we have done (Titus 3:5).
For it is by grace alone that we are saved, through faith, and this is not of ourselves, but rather this is all from God, His precious gift--not by our works, our efforts, by anything we do or could do. So that none may boast except in the grace and love of God which He has freely showered upon us through the cross of our Lord Jesus. As the Apostle has written in Ephesians 2:8-9, and Galatians 6:14.
To God alone be all glory, thanksgiving, and praise. Now and forever.
-CryptoLutheran
The word (command) is simply the authority for doing so.