In the gospel, God summons worshipers, warns of defeat and judgment to the disobedient, and promises greatest blessings upon the faithful. Sermon Outline: I. The summons to worship God (v. 6-7).II. The prophecy of Babylon's certain defeat (v. 8).III. The warning of eternal judgment (v. 9-11).IV. The promise of greatest blessing (v. 12-13).