Ye are my witnesses, saith the Lord, and my servant whom I have chosen: that ye may know and believe me, and understand that I am he: before me there was no God formed, neither shall there be after me. I, even I, am the Lord; and beside me there is no saviour. I have declared, and have saved, and I have shewed, when there was no strange god among you: therefore ye are my witnesses, saith the Lord, that I am God. Yea, before the day was I am he; and there is none that can deliver out of my hand: I will work, and who shall let it?
Prior to this passage Isaiah is prophesying about God delivering Israel from exile. As a result of this deliverance Israel is supposed to be a witness of God’s work of redemption to the world. They will tell the world that their deliverance was prophesied to them long before it ever happened, which is precisely what they did with Cyrus when they showed him that they were expecting him. The Lord is reassuring them of His faithfulness by doing what none of their idols can do. He proves that He alone is their savior and no one else.
As Christians we also have a unique testimony of God’s redemption in our lives. We are witnesses for Jesus Christ in this world and we are meant to tell others of what He has done for us. We were also living in exile, under the oppression of sin, and He delivered us from the grip of Satan. And Jesus definitely made it clear that there is no other savior besides Him, no other remission for sins than the shedding of His blood.
Our ultimate purpose in life is to be a witness of God’s saving work in our lives through Jesus. In verse 7 of this chapter God says that we were created for His glory. There is no higher purpose we could ever fulfill but to bring glory and honor to The Lord for saving us. Everything else is superfluous, unnecessary. It’s background noise. This is the only thing, and it is everything. Life only gets complicated when we forget this and try to move on from it. We start to think more about what we don’t have and complain. The pressure of meeting goals that God never set for us bears down on us and we may run to God to help us live a life He never intended for us. If you’re beat down and struggling to endure then come back to this basic principle: Jesus died to atone for your sins and justify you before God.