While the disciples were together discussing these miraculous appearances, Jesus suddenly appeared among them in the room, even though the doors were locked. This made them think they were seeing a ghost who could pass through walls, but Jesus calmed their fears by showing them his body of flesh and bones, complete with the scars of crucifixion. He also ate some fish, showing that his body had normal physical functions (Luke 24:36-43; John 20:19-20).
Jesus gave the group of disciples the teaching he had given the two on the road to Emmaus (Luke 24:44-46). They were witnesses of his ministry, death and resurrection, and he entrusted to them the task of taking his message to all nations. Equipped by his Spirit, they would be his representatives in the world. This was a great responsibility, because as they preached the gospel, people would either believe it and be forgiven, or reject it and suffer judgment (Luke 24:47-49; John 20:21-23).