The book of Daniel, one of God's prophets, is one of the most important prophetic books of the Bible. Its contents can be broken down into three main categories. First, it details the lives of Daniel and his three friends during the seventy years of captivity of the people of Judah and Jerusalem in Babylon. Second, it documents dealings Daniel and friends had with four kings of Babylon. Third, it presents the dreams of King Nebuchadnezzar and the prophetic visions of Daniel. With God's help, Daniel interpreted the king's dreams. Then, God sent the angel Gabriel to help Daniel understand his own visions. The king's dreams showed the future kingdoms of mankind in this world. Daniel's visions showed the future of the children of Israel from his time forward, to the end times, and beyond. Since the end times still lie ahead, the prophecies of Daniel are very relevant to all peoples of the world.