1. He tells who he is: I that speak in righteousness, mighty to save. He is the Saviour. God was Israel's Saviour out of the hand of their oppressors; the Lord Jesus is ours; his name, Jesus, signifies a Saviour, for he saves his people from their sins. In the salvation wrought he will have us to take notice, (1.) Of the truth of his promise, which is therein performed: He speaks in righteousness, and will therefore make good every word that he has spoken with which he will have us to compare what he does, that, setting the word and the work the one over against the other, what he does may ratify what he has said and what he has said may justify what he does. (2.) Of the efficacy of his power, which is therein exerted: He is mighty to save, able to bring about the promised redemption, whatever difficulties and oppositions may lie in the way of it.