What does the Bible say about the beast in Revelation?

The beast described in Revelation 13 rises out of the sea, symbolizing its origin from the peoples and nations of the world. This beast represents the anti-Christian governments that are used by Satan to persecute the church. As explained in Revelation 17:15, the 'waters' which the beast arises from denote multitudes of peoples and nations. Throughout history, various kingdoms have arisen with the intent to quench the message of the gospel, thus acting as instruments of persecution. Ultimately, all such powers are under God's sovereignty, as He allows them to fulfil His purpose, even while they seek to oppose His people.