Indeed, the Bible consistently connects "repentance" with "the forgiveness of sins" (see
Luke 24:47 where Peter received his commission;
Mark 1:4;
Luke 3:3;
Acts 5:31). On the day of Pentecost the Jews would have understood this because the only baptism that they knew about was the baptism of John which was a baptism of repentance UNTO (eis) the remission of sins.
The strengths of the view which sees "for the remission of sins" as part of a chiasmus are as follows: 1) it is theologically sound and avoids the error of making water baptism a condition for forgiveness; 2) it harmonizes with the other passages which speak about repentance and the forgiveness of sins; 3) it understands the preposition eis in its most natural meaning (though other meanings are possible); 4) it agrees with the parallel passage of
Acts 3:19; 5) it best suits the context of
Acts 2:38 where Peter is offering forgiveness to Christ-rejecting Jews. Peter was not speaking "with reference to" or "because of" or "on the basis of" a forgiveness which they did not yet have! 6) it employs a figure of speech (chiasmus) that was not uncommon or unusual to the Semitic mind, though in English it may seem somewhat awkward. For a detailed study of Chiasmus, see our study entitled Englishman's Greek.
Stanley D. Toussaint (The Book of Acts in The Bible Knowledge Commentary, p. 359) gives several reasons why the parenthetical view is the correct view:
Several factors support this interpretation: (a) The verb makes a distinction between singular and plural verbs and nouns. The verb "repent" is plural ["repent ye"] and so is the pronoun "your" in the clause, "so that your sins may be forgiven" (lit., "unto the remission of your sins," (eis aphesin ton hamartion humon). Therefore the verb "repent" must go with the purpose of forgiveness of sins. On the other hand the imperative "be baptized" is singular, setting it off from the rest of the sentence. (b) This concept fits with Peter's proclamation in
Acts 10:43 in which the same expression "sins may be forgiven" (aphesis harmartion) occurs. There it is granted on the basis of faith alone. (c) In
Luke 24:47 and
Acts 5:31 the same writer, Luke, indicates that repentance results in remission of sins