According to the Law, everyone will be judged by their own deeds, on his own work. So, before the judgment of God we only have our own works to boast in and not our neighbor’s. But the Gospel shows us a wonderful exception.
Baptism demolishes all boasting, for it is passively received and all that is received is pure gift. No one can, therefore, boast a better salvation than another.
Our stories are decidedly unserious when viewed through the lens of the seriousness of God’s affairs. Jesus put the matter succinctly: “For what does it profit a man to gain the whole world and forfeit his soul?” (Mark 8:36). Human affairs are not serious in and of themselves. Rather, they are consequential because they garner meaning and significance within the overarching story of God and man.
Christ and the Evangelists, along with saints Peter and Paul, show a deep attachment to the Book of Psalms...it was because the Psalms were about the Messiah, the Christ of God.
The preached word ensured the work of the Holy Spirit, so long as it was the written word of the Gospel. Gospel preaching was the one domain in which we could be assured of the convicting, saving, and sanctifying work of the Holy Spirit.
Many scholars believe that what Jesus says in verses 18-20 are the key to Matthew's Gospel. Actually, it may be the key to the entire Bible, for in these three verses we see the full scope of the history of redemption brought to bear in one history-altering, cosmic event: Baptizing in God's name.