Micah 4:1

Reference to "the last days" often points to the eschatological future in the Prophets, and it does here (e.g., Deuteronomy 4:30; Ezekiel 38:16; Daniel 2:28; Daniel 10:14; Hosea 3:5). This phrase usually refers to the Tribulation and or the Millennium. Some New Testament writers said that Christians live in the last days, namely, the days preceding Messiah’s return to the earth and the establishment of His kingdom on earth (e.g., Hebrews 1:2; Hebrews 9:26; 1 Peter 1:20).

"The mountain of the house of the Lord" is Mt. Zion where the temple, the Lord’s house, stood in the past and will stand in the future (cf. Ezekiel 40-43). In the future, Mt. Zion would become the chief of all the mountains on earth rising above all other hills in its importance (cf. Genesis 12:3; Zechariah 8:3). "Mountain" is also a figure for a kingdom in the Old Testament (e.g., Daniel 2:35; Daniel 2:44-45). Here it probably has the double significance of literal Mt. Zion (Jerusalem) and the whole kingdom of Israel that Mt. Zion represents (by metonymy). People from all parts of the earth will migrate to it. This is quite a contrast from what Micah predicted about the immediate future of Jerusalem and the temple: its destruction and abandonment (cf. Micah 3:12). Literal streams of water will flow from this millennial temple (Ezekiel 47), but people will stream to it. [Note: Mays, pp. 96-97.]

"Year by year bands of pilgrims would make their way to Jerusalem to engage in festive worship, in the course of which they would receive instruction in the moral traditions of the covenant. This Israelite pilgrimage is here magnified to universal dimensions. Not merely Israel, but their pagan neighbors from all around would one day wend their way to Yahweh’s earthly residence, and there learn lessons which they would put into practice back in their own communities." [Note: Allen, p. 323.]