-- no man can find out the work God makes from the beginning to the end Ecclesiastes 3:11

-- I the Lord, called the generations from the beginning, I am the first and last Isaiah 41:4

-- the King of Israel, and his redeemer, I am the first and last Isaiah 44:6

-- Declaring the end from the beginning Isaiah 46:10

-- I am he, I am the first, I also am the last Isaiah 48:12

-- having neither beginning of days nor end of life Hebrews 7:3

-- the word of God lives and abides for ever 1 Peter 1:23

-- from him which is, and which was, and which is to come Revelation 1:4

-- I am Alpha and Omega, the beginning and end, which is, was, and to come Revelation 1:8

-- I am Alpha and Omega, the first and last Revelation 1:11

-- Fear not, I am the first and the last Revelation 1:17

-- These things says the first and the last, which was dead and is alive Revelation 2:8

-- Lord God Almighty, which was, and is, and is to come Revelation 4:8

-- sware by him that liveth for ever and ever Revelation 10:6

-- there should be time no longer Revelation 10:6

-- which is, and which was, and which is to come Revelation 1:4

-- I am alpha and Omega Revelation 21:6

-- the beginning and the end Revelation 21:6

-- I am Alpha and Omega Revelation 22:13

-- I am the beginning and the end Revelation 22:13

-- I am the first and the last Revelation 22:13

Ecclesiastes 3:11 KJV
[11] He hath made every thing beautiful in his time: also he hath set the world in their heart, so that no man can find out the work that God maketh from the beginning to the end.

Isaiah 41:4 KJV
[4] Who hath wrought and done it, calling the generations from the beginning? I the Lord, the first, and with the last; I am he.

Isaiah 44:6 KJV
[6] Thus saith the Lord the King of Israel, and his redeemer the Lord of hosts; I am the first, and I am the last; and beside me there is no God.

Isaiah 46:10 KJV
[10] Declaring the end from the beginning, and from ancient times the things that are not yet done, saying, My counsel shall stand, and I will do all my pleasure:

Isaiah 48:12 KJV
[12] Hearken unto me, O Jacob and Israel, my called; I am he; I am the first, I also am the last.

Daniel 4:34 KJV
[34] And at the end of the days I Nebuchadnezzar lifted up mine eyes unto heaven, and mine understanding returned unto me, and I blessed the most High, and I praised and honoured him that liveth for ever, whose dominion is an everlasting dominion, and his kingdom is from generation to generation:

Daniel 12:7 KJV
[7] And I heard the man clothed in linen, which was upon the waters of the river, when he held up his right hand and his left hand unto heaven, and sware by him that liveth for ever that it shall be for a time, times, and an half; and when he shall have accomplished to scatter the power of the holy people, all these things shall be finished.

Hebrews 7:3 KJV
[3] Without father, without mother, without descent, having neither beginning of days, nor end of life; but made like unto the Son of God; abideth a priest continually.

1 Peter 1:23 KJV
[23] Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever.

Revelation 1:4 KJV
[4] John to the seven churches which are in Asia: Grace be unto you, and peace, from him which is, and which was, and which is to come; and from the seven Spirits which are before his throne;

Revelation 1:8 KJV
[8] I am Alpha and Omega, the beginning and the ending, saith the Lord, which is, and which was, and which is to come, the Almighty.

Revelation 1:11 KJV
[11] Saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send it unto the seven churches which are in Asia; unto Ephesus, and unto Smyrna, and unto Pergamos, and unto Thyatira, and unto Sardis, and unto Philadelphia, and unto Laodicea.

Revelation 1:17 KJV
[17] And when I saw him, I fell at his feet as dead. And he laid his right hand upon me, saying unto me, Fear not; I am the first and the last:

Revelation 1:18 KJV
[18] I am he that liveth, and was dead; and, behold, I am alive for evermore, Amen; and have the keys of hell and of death.

Revelation 2:8 KJV
[8] And unto the angel of the church in Smyrna write; These things saith the first and the last, which was dead, and is alive;

Revelation 4:8 KJV
[8] And the four beasts had each of them six wings about him; and they were full of eyes within: and they rest not day and night, saying, Holy, holy, holy, Lord God Almighty, which was, and is, and is to come.

Revelation 4:9-10 KJV
[9] And when those beasts give glory and honour and thanks to him that sat on the throne, who liveth for ever and ever, [10] The four and twenty elders fall down before him that sat on the throne, and worship him that liveth for ever and ever, and cast their crowns before the throne, saying,

Revelation 5:14 KJV
[14] And the four beasts said, Amen. And the four and twenty elders fell down and worshipped him that liveth for ever and ever.

Revelation 10:6 KJV
[6] And sware by him that liveth for ever and ever, who created heaven, and the things that therein are, and the earth, and the things that therein are, and the sea, and the things which are therein, that there should be time no longer:

Revelation 21:6 KJV
[6] And he said unto me, It is done. I am Alpha and Omega, the beginning and the end. I will give unto him that is athirst of the fountain of the water of life freely.

Revelation 22:13 KJV
[13] I am Alpha and Omega, the beginning and the end, the first and the last.

Just because you do not understand something does not mean that it is not true or does not exist.
You do not understand all the things that God has done or can do, but that does not mean that God has not done them or cannot do them.
The fact that God has created all things proves the point.

Romans 1:20 KJV
[20] For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:

Hebrews 11:3 KJV
[3] Through faith we understand that the worlds were framed by the word of God, so that things which are seen were not made of things which do appear.