When Luke sat down to write his sequel to the gospel story of Jesus, he began his second volume with a strange statement: "In my former book… I wrote about all that Jesus began to do and to teach until the day he was taken up to heaven" (Acts 1:1-2). Began to do and teach? Well, after he ascended into heaven, didn't Jesus stop "doing" and "teaching"? Apparently not, according to Luke...
