Isaiah 2:3
3Many peoples shall go and say, “Come, let’s go up to the mountain of the LORD, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths.” For the law shall go out of Zion, and the LORD’s word from Jerusalem.
Arminian
Many peoples go and say, Come, let’s go up to the mountain of the LORD, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths. Wesley: the law is the new law, the doctrine of the gospel, obliging belief and practice as the old law did.
“Come”—speech, going, walking. They ask to be taught and then walk. Agency under a God who actually teaches.
Reformed
Calvin: many means various nations, formerly strangers, now one agreement about religion. God might bring each by a secret influence, yet He employs the agency of men. They do not sit and command Go up, but walk along as companions. He will teach us of His ways: God alone is the Church’s teacher; pastors may utter nothing but His word. We will walk: the instruction is not speculation; it directs the course of life. Law is all the instruction God has given; it went forth from Zion when the gospel began there.
The going is gathered by the word He sends.