Summary: His mission, to bring Justice to the nations, will not fail.
MANIFESTO OF THE SERVANT
Isaiah 42:1-9 - First Servant Song
After healing the multitudes, Jesus charged them that they should not make Him known (Matthew 12:15-17). According to Matthew 12:18-21, this was in fulfillment of the passage in Isaiah which we have just read. Thus the New Testament identifies the Servant in this song as Jesus.
“Behold my Servant,” says the LORD (Isaiah 42:1). This contrasts the Servant with the impotent idols of the previous verse (Isaiah 41:29; cf. Isaiah 42:8). It also sets this Servant above all other aspiring servants of God (including ourselves).
The Servant is “upheld” (by the Creator of heaven and earth - cf. Isaiah 42:5). This suggests the certainty that His mission to “bring justice to the nations” (Isaiah 42:1) will not fail. To that end, ‘All power’ has been given into Jesus’ hand (Matthew 28:18).
The LORD also introduces the Servant as “my chosen One in whom I delight: I have put my Spirit upon Him” (Isaiah 42:1). Jesus is the chosen One of God: and the Father is ‘well pleased’ with the Son (Matthew 3:17; Matthew 17:5).
‘The Spirit of the LORD shall rest upon Him,’ promised Isaiah 11:2-4. The Holy Spirit descended upon Jesus at His baptism (Matthew 3:16). This is how the “upholding” of the Servant takes place: by the sustaining power of God through the ministry of the Holy Spirit.
Thus also Jesus’ ministry was articulated with a reading of Isaiah 61:1-2, ‘the Spirit of the Lord is upon me.’
Jesus’ sermon on that text began: ‘This day is this Scripture fulfilled in your ears’ (Luke 4:21).
With this Spiritual endowment in mind, the LORD declares the success of the Servant’s mission: “He shall bring forth a just order for the Gentiles” (Isaiah 42:1).
“Justice” is a key word in the first part of our passage: recurring again in Isaiah 42:3, “In faithfulness He shall bring forth justice”; and Isaiah 42:4, “…until He has established justice in the earth”.
Yet the Servant comes first of all without show (Isaiah 42:2), pleading with people to keep the Messianic secret until the time is right (Matthew 17:9). Then there is a tenderness about Jesus’ ministry, as implied in the figurative language of Isaiah 42:3. And perhaps a big part of “bringing forth justice” (Isaiah 42:3) is in the Jubilee intimated in Isaiah 42:7 and Isaiah 61:1-2.
Parallel to “justice” is “law” (Isaiah 42:4). The prophet perceives distant lands waiting with longing for the Servant’s instructions.
The LORD now addresses the Servant, affirming His call: “I the LORD have called you in righteousness” (Isaiah 42:6). Again (as in the “upholding” of Isaiah 42:1), the LORD has taken Him in hand, and will “keep” Him.
The LORD continues: “I will make you to be a (mediator of the) covenant of the people, dispensing light to the nations” (Isaiah 42:6). "The people" appear as 'Israel' elsewhere (cf. Isaiah 49:6; Luke 2:32). Thus Israel is the olive tree, into which the Christian Church is grafted (Romans 11:24).