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The Bible can be divided into six sections-the Torah, the Prophets, the Writings, the Gospels, the Epistles, and the Apocalypse (Revelation). Almost all of these books point towards the King Messiah and the coming of God's Kingdom on earth. The rest teach us about morals and other stuff.
The Torah is about God's Law and the establishment of the nation of Israel as a light to the nations. The Torah also points towards the King Messiah: "I see him, but not now; I behold him, but not nigh; There shall step forth a star out of Jacob, And a scepter shall rise out of Israel, And shall smite through the corners of Moab, And break down all the sons of Seth" (Num 24:17). But God's Torah is not limited to just the first five books of the Bible or the Law within the Torah but includes all of the teachings and instructions (which is what "Torah" means) found throughout all of Scripture including Oral Torah such as recorded in Matthew chapter five.
The Prophets are mostly about God sending the children of Israel into captivity for their sin. The Prophets' primary purpose was to the bring the children of Isrsel back to submission to God's Law. Their secondary purpose was about future prophecies. God would give the Prophets revelation about how He was going to send the children of Israel into captivity for their sin but He also gave them comforting revelation about how He was going to bring them back and raise up a Messianic King to establish peace on earth (Isa 2)(Isa 11)(Zec 14)(etc).
The Writings contain very useful knowledge including history but they also include books which deal with morality-among these are the book of Proverbs and the book of Sirach. The most interesting book in the Writings is the book of Daniel which also contains a lot of prophecy regarding the last days and fits in with the book of Revelation. Daniel alsoprophesied much about the Messianic King. Here is one example: "I saw in the night visions, And, behold, there came with the clouds of heaven One like unto a son of man, And he came even to the Ancient of days, And he was brought near before Him. And there was given him dominion, And glory, and a kingdom, That all the peoples, nations, and languages Should serve him; His dominion is an everlasting dominion, which shall not pass away, And his kingdom that which shall not be destroyed." (Daniel 7:13-14)
The Gospels are about the First Advent of the Messiah-that is, he would suffer and atone for the sins of the world (Isa 52:13-Isa 53). But Jesus actually talked about the Kingdom of God before he talked about his crucifixion.
The Epistles to the Churches are about the regulation of the Church and the saints of God. The Church Age, which we are currently under, is about preparing the nations for God's Kingdom and the Messianic Age.
The Apocalypse (the book of Revelation), discusses the events that will precede the Second Advent of the Messianic King and it concludes with God's Kingdom established on earth as well as the triumph of the saints and the destruction of the wicked. It also prophecies about the new heaven and the new earth (Rev 21).