"The declaration of Jesus that He is Himself Alpha and Omega conveys the thought of infinite and inexhaustible wealth. The letters A to Z constitute a claim by which is set forth the absolute completeness of His character, wisdom, and power. Is this not what Jesus was saying when He declared, “I AM THE TRUTH.” And is this not what Jesus is saying: “I AM THE TOTAL REALITY OF ALL THINGS!” I am every letter, I am unique, I am substance, I am shape, I am image, I am form, I am essence, I am all height and depth and length and breadth of Being, not just words and letters, but the reality of life and power and value of all things, the WORD OF LIFE!” “In the beginning was the Word, and the Word was with God, and the Word was God…and the Word was made flesh, and dwelt among us, and we beheld His glory, the glory as of the only begotten of the Father, full of grace and truth” (Jn. 1:1,4)."
"Alpha and Omega is a revelation! It is all that can be said of the Lord Jesus proclaimed in a way that can be seen and understood. It stands for the revelation of Jesus Christ! By this word He is revealed! Christ is the alphabet — the Word, all that can be said of God. We’ve seen that in the figure of a Man who walked the shores of Galilee. But we have only touched the shell of that man, the outer image, not the inner intelligence. It’s as though we are holding a book, looking at it, flipping its pages, but we haven’t read it yet. The inner intelligence of the Lord Jesus represents His omniscient mind, His omnipotent power, and His divine nature. Until we have personally experienced Him in all that He is we have not discovered Him in the A to Z — that is, we have not read the book which He is! In speaking of the inner intelligence of the Lord Jesus, we are speaking of the greatest reality of Being in the universe! The truth we are entertaining at this point will prove that all our eternal hopes of sonship and the kingdom depend upon one thing and one thing alone: that the mind of Christ, the power of Christ, and the nature of Christ dwell in us fully. This is the Alpha and the Omega — all that can be said of God WRITTEN AND INSCRIBED IN OUR INNER LIFE AS CHRIST IN US."
Much more in the link:
https://www.kingdombiblestudies.org/Revelation/rev238.htm
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"And that is how it is in the new creation! For you see, beloved, the new creation is but the old creation re-conciled, re-deemed, re-generated, re-stored to its original place, condition, and state IN CHRIST! The new spiritual creation is all that is “in Christ Jesus” in the fullness of what that means. We are unified again in Him. Not only are we unified with one another, but each of us is unified within ourself — there is PEACE. The new creation has already begun! Step by step, just as we came out of God, we are now coming back into God. When the scripture says, “If any man be in Christ he is a new creation: old things are passed away, behold, all things are become new,” this is speaking of that little firstfruits company that is the first to enter experientially into the new. These become fully a new creation in Christ. In the life of the one who has truly entered into Christ, and been unified again in Him, all the old has passed away and everything has become new! Now I know this scripture is applied to all believers of whatever stage of spiritual growth and development in Christ, but if we consider this reverently and carefully, we can easily see that this is not the experience of the average believer. When we first believe on the Lord a new beginning takes place. A change has started. Some of the old has passed away, and some new things have taken their place; but how many believers can honestly say that ALL old things have passed away, and EVERYTHING in their lives and experience has been made new? Our restoration is a progressive work! It begins when we first turn to the Lord, and continues until we are completely restored into Christ!"