Afterwards he appeared to the eleven themselves as they were reclining at table, and he rebuked them for their unbelief and hardness of heart, because they had not believed those who saw him after he had risen. And he said to them, “Go into all the world and proclaim the gospel to the whole creation. Whoever believes and is baptized will be saved, but whoever does not believe will be condemned. And these signs will accompany those who believe: in my name they will cast out demons; they will speak in new tongues; they will pick up serpents with their hands; and if they drink any deadly poison, it will not hurt them; they will lay their hands on the sick, and they will recover.”
So then the Lord Jesus, after he had spoken to them, was taken up into heaven and sat down at the right hand of God. And they went out and preached everywhere, while the Lord worked with them and confirmed the message by accompanying signs.
The men who had followed Yeshu for three years finally believed when he shared a meal with them. He was the same Yeshu with the same speech and the same hands which had been pierced with nails; he was not a ghost. He, the same Yeshu, had risen; it was a fact. It was not something that they forced themselves to believe; it was not an invented story.
Now they must pass on the good news. He promised them power to speak and protection against poisoning.
So the good news spread in Asia, and to Africa, and to Europe.
How the good news spread is told in the Book of Acts – see http://www.gsungrab.org for bible books in Tibetan.