What does Numbers 24:17 mean?

I see someone coming, but not right now. I see him, but he's still far off. A star will rise from Jacob, and a ruler's staff will come from Israel. He'll crush the heads of Moab and destroy all the sons of Sheth. Numbers 24:17 - Modern Text Bible

(Balaam is predicting a future leader from Israel who will defeat Israel's enemies. The 'star' and 'scepter' are symbols of power and kingship.)