Isaiah's Appeal For Men To Hear Him.
‘Who is among you who fears Yahweh,
Who obeys the voice of his servant?
He who walks in darkness and has no light,
Let him trust in the name of Yahweh, and stay upon his God.'
Isaiah now makes his appeal to those who fear Yahweh and obey the voice of His Servant. They walk in darkness, the way seems dark before them, everything is black before them, there seems to be no light. (This is not the same as the idea of walking in spiritual darkness. This is the darkness which God uses to test our willingness to serve Him ‘in the dark', when all is not clear). But they must trust God in the dark. They must trust in the name of Yahweh and stay themselves on God. So even those who fear Yahweh are in a kind of darkness and need to receive light from the Servant. Those who walk in such darkness are described in Isaiah 42:16, and they are promised that they will find light as they walk in the way with God. The secret of deliverance is to hear the voice of Yahweh's Servant and to trust in Yahweh Himself (John 5:24). For His way is not easy, and we must walk with Him in it.
Note that a clear distinction is made here between the Servant and those who generally fear God. They must hear the voice of His Servant. He has now become the One to Whom believing Israel must look.