Acts 1:1-3

Dear Theophilus, in my previous book I wrote about all that Jesus did and taught from the beginning

until the day he was taken up to heaven. This was after he'd given instructions through the Holy Spirit to his chosen apostles.

Over the course of forty days after the death he suffered, he showed himself to them, proving that he was alive with convincing evidence. He appeared to them, and told them about the kingdom of God.