1 Peter 3:21

“The like figure whereunto [even] baptism doth also now save us, etc.] The ark, and deliverance by it, as it was a type of Christ, and salvation by him, so it was a figure of baptism, and baptism was the antitype of that; or there is something in these which correspond, and answer to, and bear a resemblance to each other: as the ark was God's ordinance, and not man's invention, so is baptism, it is of heaven, and not of men; and as the ark, while it was preparing, was the scorn and derision of men, so is this ordinance of the Gospel; it was rejected with disdain by the Scribes and Pharisees, as it still is by many; and as the ark, when Noah and his family were shut up in it by God,…”

“whereunto--The oldest manuscripts read, "which": literally, "which (namely, water, in general; being) the antitype (of the water of the flood) is now saving (the salvation being not yet fully realized by us, compare Co1 10:1-2, Co1 10:5; Jde 1:5; puts into a state of salvation) us also (two oldest manuscripts read 'you' for 'us': You also, as well as Noah and his party), to wit, baptism." Water saved Noah not of itself, but by sustaining the ark built in faith, resting on God's word: it was to him the sign and mean of a kind of regeneration, of the earth. The flood was for Noah a baptism, as the passage through the Red Sea was for the Israelites; by baptism in the flood he and his family…”

“The like figure whereunto, even baptism, doth also now save us - There are some various readings here in the Greek text, but the sense is not essentially varied. Some have proposed to read (ῷ hō) to which instead of (ὅ ho) which, so as to make the sense “the antitype to which baptism now also saves us.” The antecedent to the relative, whichever word is used, is clearly not the ark, but water; and the idea is, that as Noah was saved by water, so there is a sense in which water is made instrumental in our salvation. The mention of water in the case of Noah, in connection with his being saved, by an obvious association suggested to the mind of the apostle the use of water in our salvation,…”

“The antitype whereof - The thing typified by the ark, even baptism, now saveth us - That is, through the water of baptism we are saved from the sin which overwhelms the world as a flood: not, indeed, the bare outward sign, but the inward grace; a divine consciousness that both our persons and our actions are accepted through him who died and rose again for us. 1 Peter 3:22”

“3:21 a picture of baptism: Peter might mean that, as the water floated the boat in which Noah and his family were saved, so baptism saves believers. Or he might mean that, as Noah and his family passed through water to safety, so Christians pass through the waters of baptism to salvation. Finally, he might mean that, as the water judged sin in Noah’s day, so the water of baptism washes away the sins of Christians. • Peter does not mean that water baptism saves a person regardless of that person’s heart. He adds that baptism saves only as a response to God from (or as an appeal to God for) a clean conscience, thus making clear that only people exercising faith toward God will benefit from…”

“like: Rom 5:14; Co1 4:6; Heb 9:24 \*Gr: Heb 11:19 baptism: Mat 28:19; Mar 16:16; Act 2:38, Act 22:16; Rom 6:3-6; Co1 12:13; Gal 3:27; Eph 5:26; Col 2:12; Tit 3:5-7 the putting: Eze 36:25, Eze 36:26; Zac 13:1; Co2 7:1 the answer: Act 8:37; Rom 10:9, Rom 10:10; Co2 1:12; Ti1 6:12 by: Pe1 1:3 1 Peter 3:22”