On the Day of Pentecost, when the Jews believed and were cut to the heart, they said to St. Peter and the other Apostles: "Men and brethren, what shall we do?" Then St. Peter and the Apostles replied: "Repent, and let every one of you be baptised in the name of Jesus Christ for the remission of sins" (Acts 2: 37,38).
If the belief of the Jews was adequate for the forgiveness of sins, the great Apostles would not have instructed them to be baptised, especially on such an historical day; the day of establishing the Church; the day on which important principles were being set up for salvation.
One may ask: How are sins forgiven in baptism? We reply: