When Jesus died, and the world didn’t end, the disciples faked Jesus’ resurrection, and changed Jesus message from an apocalyptic one into one which contains timeless and spiritual truths, the Book of Acts, according to Reimarus, is a record of this.
the disciples were disappointed when Jesus’ message did not prevail. This led them to chase a lie, to keep ‘the flame alive’ by proclaiming a list of profound statements regarding Jesus’ life, at the expense of the truth.