Isaiah 41:1-20 The author speaks of the "people of Jacob" (i.e. members of the Twelve tribes of Israel descended from the twelve sons of Jacob or 'Israel' - see Genesis 32:24-32) as the chosen people and the "servant" of the LORD (Isaiah 41:8). They are God’s chosen people, and he is their only saviour.
"So don't worry because I am with you. Don't be afraid because I am your God. I will make you strong and will help you; I will support you with my right hand that saves you." (Isaiah 41:10)
"I will make rivers flow on the dry hills and springs flow through the valleys. I will change the desert into a lake of water and the dry land into fountains of water." (Isaiah 41:18)
Nahal Kana, Israel (Revava Schatz)
Isaiah 41: 21-29 The LORD challenges the worship of foreign gods that the exiles are indulging in. He says there is no point consulting idols as "None of them can give advice; none of them can answer my questions". Indeed, "They cannot do anything; they are worth nothing." (Isaiah 41:28-29)
Isaiah 42:1-25 The Lord speaks again about his 'servant', "the one I support." "He is the one I chose, and I am pleased with him. I have put my Spirit upon him, and he will bring justice to all nations." (Isaiah 42:1).
In this passage, Isaiah is refering to the descendents of Jacob as the 'servant' of the LORD. In the New Testament, these words are heard at the baptism of Jesus of Nazareth (see Mark 1:11), and Matthew says that Isaiah's words were fulfilled through Jesus's ministry (see Matthew 12:15-21).
Isaiah 43:1-28 The LORD tells his people, "Don't be afraid, because I have saved you. I have called you by name, and you are mine" (Isaiah 43:1). "The LORD says, 'You are my witness and the servant I chose. I chose you so you would know and believe me, so that you would understand that I am the true God. There was no God before me, and there will be no God after me. I myself am the LORD; I am the only Saviour." (Isaiah 43:10-11)
Alpha & Omega are the first & last letters of the Greek alphabet - the beginning & the end
Isaiah 44:1-28 The LORD God is the only God who can save Israel. He says “I am the beginning and the end. I am the only God.” (Isaiah 44:6)
In the New Testament, John's vision in the Book of Revelation puts new meaning into Isaiah's words about "the only God". John refers to the first and last letters of the Greek alphabet - Alpha and Omega - which signify the beginning and the end, and points towards Jesus Christ as "the Alpha & the Omega, the Beginning and the End" of all creation (Revelation 21:6).