And in those times there shall many stand up against the king of the south: also the robbers of thy people shall exalt themselves to establish the vision; but they shall fall.
And in those times there shall many stand up against the king of the south - Philip king of Macedon, and rebels in Egypt itself, combined with Antiochus against Ptolemy.
Also the robbers of thy people shall exalt themselves - i:e., factious men of the Jews shall exalt themselves, so as to revolt from Ptolemy, and join themselves to Antiochus: the Jews helped with provisions Antiochus' army, when on his return from Egypt he besieged the Egyptian garrison left in Jerusalem (Josephus, 'Antiquities' 12: 3, 3).
To establish the vision - those turbulent Jews unconsciously shall help to fulfill the purpose of God, as to the trials which await Judea, according to this vision.
But they shall fall - though helping to fulfill the vision, they shall fail in their aim, of making Judea independent.