Note 6 at Mr 1:5: This does not literally mean that all the people who lived in Judea and Jerusalem were baptized by John. Lu 7:29-30 shows that the Pharisees and lawyers of this area were not baptized by John. The word "all" is used here as a figure of speech, as in 1Ki 11:16, Lu 2:1-3, and Ac 2:45. It is speaking of a part as if it were a whole. This is the same way we speak today. Example: "All the town (or everyone) will be at the parade."

Note 7 at Mr 1:5: Under John's baptism, the people confessed their sins. In the church age of salvation, we confess the Lord Jesus as the payment for our sins (Ro 10:9). After salvation, we confess our sins for the purpose of receiving forgiveness and cleansing for our outer man (1Jo 1:9). Compare with Ac 16:30-31.