It is a mistake to assume the disciples were the only witnesses of the risen Christ. Such an assumption leaves a big gap in explaining the vast spread of Christianity in such a short period of time. A careful reading of the book of Acts shows us that there were many more witnesses whose preaching was consistently focused on one thing: the risen Christ and the power of His Resurrection. Acts. Disc 6 of 6 from the series Christianity on Trial: Examining the Evidence - VF-2183. Acts.