Jamieson, Fausset and Brown on Isaiah 2:2

2. Same as Mi 4:1. As Micah prophesied in Jotham's reign, and Isaiah in Uzziah's, Micah rests on Isaiah, whom he confirms: not vice versa. Hengstenberg on slight grounds makes Mi 4:1 the original.

last days--that is, Messiah's: especially the days yet to come, to which all prophecy hastens, when "the house of the God of Jacob," namely, at Jerusalem, shall be the center to which the converted nations shall flock together (Mt 13:32; Lu 2:31, 32; Ac 1:6, 7); where "the kingdom" of Israel is regarded as certain and the time alone uncertain (Psa 68:15, 16; 72:8, 11).

mountain of the Lord's house ... in the top, &c.--the temple on Mount Moriah: type of the Gospel, beginning at Jerusalem, and, like an object set on the highest hill, made so conspicuous that all nations are attracted to it.

flow--as a broad stream (Is 66:12).