From the Gospels we learn that the Apostles returned and met with Jesus and told Him all they had done and taught (Mk 6:30). After Jesus' Ascension, the Apostles met among themselves to report on their apostolic activities (see Acts 14:27-28; 15:4, 12; 21:17-20). Witnessing challenges the members to fulfill the final command of the Lord: "Go, therefore, and make disciples of all nations" (Mt 28:19).