His power will be great, but it will not be his own. He will cause terrible destruction and succeed in whatever he does. He will destroy the mighty men along with the holy people.
Jewish Publication Society of America Version (JPS1917) - Daniel 8:24 >And his power shall be mighty, but not by his own power; and he shall destroy wonderfully, and shall prosper and do; and he shall destroy them that are mighty and the people of the saints.