Jesus says that his apostles will be his witnesses by the power of the Holy Spirit. The Holy Spirit gives his people the power to testify about Jesus. But his words must have seemed almost ludicrous when Jesus uttered them. He was speaking to very ordinary people who were terrified by what they had seen done to Jesus and who were still hiding from the Jewish authorities. It must have been overwhelming and almost impossible to believe Jesus’ words, for his message was that they would be Jesus’ witnesses to the ends of the earth. Impossible? Ordinarily, yes. But these were the words of Jesus, the Son of the living God who was raised from the dead, and they came with promises. Jesus promised the power of the Holy Spirit.