"Therefore, produce fruit consistent with repentance… ‘What then should we do?’ The crowds were asking him. He (John the Baptist) replied to them, ‘The one who has two shirts should share with the one who has none, and the one who has food must do the same.’" (Luke 3:8, 10-11)
The root of all sin is pride, in some form, and as I read this passage John lays out a chronology of effective Christian living. After coming to the realization that we are sinners and that there is nothing we can do within our power to make our relationship with God right, we pray and repent of our sin. This is the first and necessary step in re-establishing our right relationship with God. John states that after repentance we must, "produce fruit consistent with repentance". This is news to the crowd then, and is still news to us today.