23:15 But while men were cruel and vindictive, or criminally negligent of the solemn responsibilities devolving upon them, God had not forgotten to be gracious to His servants. All heaven was interested in the men who were suffering for Christ's sake, and angels were sent to visit the prison. At their tread the earth trembled. The heavily bolted prison doors were thrown open; the chains and fetters fell from the hands and feet of the prisoners; and a bright light flooded the prison.