“Jesus said to them.
‘Go into all the world!
Proclaim the good news!
Preach the gospel
To the whole creation!’”
καὶ εἶπεν αὐτοῖς Πορευθέντες εἰς τὸν κόσμον ἅπαντα κηρύξατε τὸ εὐαγγέλιον πάσῃ τῇ κτίσει.
This addition of Mark, is like the addition in Matthew, chapter 28:19-20. This text indicated that Jesus told the 11 apostles (καὶ εἶπεν αὐτοῖς) that they were to go into the whole world (Πορευθέντες εἰς τὸν κόσμον ἅπαντα). They were to proclaim the good news or preach the gospel (κηρύξατε τὸ εὐαγγέλιον) to all creation (πάσῃ τῇ κτίσει). Obviously, the mission of the early Christians was to preach the good news, the gospel of Jesus Christ, to everyone.