[20:28] 1 sn The Greek word for ransom (λύτρον, lutron) is found here and in Mark 10:45 and refers to the payment of a price in order to purchase the freedom of a slave. The idea of Jesus as the “ransom” is that he paid the price with his own life by standing in our place as a substitute, enduring the judgment that we deserved for sin.
[1:4] 3 tn While Matthew and Luke consistently use the noun βαπτίστης (baptisths, “[the] Baptist”) to refer to John, as a kind of a title, Mark prefers the substantival participle ὁ βαπτίζων (Jo baptizwn, “the one who baptizes, the baptizer”) to describe him (only twice does he use the noun [Mark 6:25; 8:28]).
[1:4] 4 sn A baptism of repentance for the forgiveness of sins was a call for preparation for the arrival of the Lord’s salvation. To participate in this baptism was a recognition of the need for God’s forgiveness with a sense that one needed to live differently as a response to it.