In my earlier work, Theophilus, I dealt with everything Jesus had done and taught from the beginning
until the day he gave his instructions to the apostles he had chosen through the Holy Spirit, and was taken up to heaven.
He had shown himself alive to them after his Passion by many demonstrations: for forty days he had continued to appear to them and tell them about the kingdom of God.
While at table with them, he had told them not to leave Jerusalem, but to wait there for what the Father had promised. 'It is', he had said, 'what you have heard me speak about:
John baptised with water but, not many days from now, you are going to be baptised with the Holy Spirit.'
Now having met together, they asked him, 'Lord, has the time come for you to restore the kingdom to Israel?'
He replied, 'It is not for you to know times or dates that the Father has decided by his own authority,
but you will receive the power of the Holy Spirit which will come on you, and then you will be my witnesses not only in Jerusalem but throughout Judaea and Samaria, and indeed to earth's remotest end.'
As he said this he was lifted up while they looked on, and a cloud took him from their sight.
They were still staring into the sky as he went, when suddenly two men in white were standing beside them,
and they said, 'Why are you Galileans standing here looking into the sky? This Jesus who has been taken up from you into heaven will come back in the same way as you have seen him go to heaven.'