Rev 1:7 Behold, He is coming with clouds, and every eye will see Him, even they who pierced Him. And all the tribes of the earth will mourn because of Him. Even so, Amen. Rev 1:8 “I am the Alpha and the Omega, the Beginning and the End,” says the Lord, “who is and who was and who is to come, the Almighty.”
All four phrases could easily be variations on the theme of power. God is the Alpha and Omega, Beginning and End, “Who is, was, and is to come”, and is Almighty.
The themes about being the First and the Last come directly from God’s primary power claims in Isaiah (chapters 40-48):
Isa 41:3 Who pursued them, and passed safely By the way that he had not gone with his feet? Isa 41:4 Who has performed and done it, Calling the generations from the beginning? ‘I, the LORD, am the first; And with the last I am He.’ ” Isa 41:5 The coastlands saw it and feared, The ends of the earth were afraid; They drew near and came.
Isa 44:3 For I will pour water on him who is thirsty, And floods on the dry ground; I will pour My Spirit on your descendants, And My blessing on your offspring; … Isa 44:6 “Thus says the LORD, the King of Israel, And his Redeemer, the LORD of hosts: ‘I am the First and I am the Last; Besides Me there is no God. Isa 44:7 And who can proclaim as I do? Then let him declare it and set it in order for Me, Since I appointed the ancient people. And the things that are coming and shall come, Let them show these to them.
Isa 46:9 Remember the former things of old, For I am God, and there is no other; I am God, and there is none like Me, Isa 46:10 Declaring the end from the beginning, And from ancient times things that are not yet done, Saying, ‘My counsel shall stand, And I will do all My pleasure,’
Isa 48:10 Behold, I have refined you, but not as silver; I have tested you in the furnace of affliction. Isa 48:11 For My own sake, for My own sake, I will do it; For how should My name be profaned? And I will not give My glory to another. Isa 48:12 “Listen to Me, O Jacob, And Israel, My called: I am He, I am the First, I am also the Last. Isa 48:13 Indeed My hand has laid the foundation of the earth, And My right hand has stretched out the heavens; When I call to them, They stand up together.
Notice the coupling of activity with “First and Last”. God has performed. God is the First and the Last. God has no equal among other gods. God is the First and the Last. God does everything He wants. God declares the end from the beginning. God created heaven and Earth. God is the First and the Last. These are power claims.
There is no reason to think the idioms would have morphed into some idea of timelessness.
God is the Alpha and Omega because God is powerful. God is the First and the Last because God is powerful. God is the Beginning and the End because God is powerful. God is Almighty because God is powerful. The phrase is about power, not lifespan or interaction with time.’
Source: Christopher Fisher, “misquoted verses – alpha and omega” (realityisnotoptional).