On the verse from Bilaam's prophecy "a ruler will come forth from Jacob," Rashi explains, "this is Moshiach who will 'rule from sea to sea and from the river to the ends of the earth.'"
What does it mean to "rule from sea to sea" in one's own life? What is "the river" and how does that take each one of us "to the ends of the earth"?
Based on Likkutei Sichos vol. 38, pp. 100-102.