That’s why we read …
“In the beginning was the Word, and the Word was with God, and the Word was God. He was in the beginning with God. All things were made through Him, and without Him nothing was made that was made. ” John 1:1-3 Word refers to Jesus**
… rather that in the beginning there was nothing.
“Before the mountains were brought forth,
Or ever You had formed the earth and the world,
Even from everlasting to everlasting, You are God.” Psalm 90:2
Thus God revealed to us that all of creations were made by Him and that He is from Eternity to Eternity and is outside the dimension of time. God existed since eternity and that Jesus existed in eternity with Him.
God is eternal and He created time. Only One who is outside of time, that is, timeless, or eternal, could do this.
“In the beginning God created the heaven and the earth.” Genesis 1:1
In the beginning – BEFORE the creative acts stated in this chapter – ALL was and is ETERNITY. Time signifies duration measured by the revolutions of the heavenly bodies; but prior to the creation of these bodies there’s no quantifying of duration and for that reason – no ‘time’: consequently, ‘in the beginning’; in the context of this statement, must evidently mean the inauguration of time which followed, or rather was constructed by God’s creative acts, as an effect follows or is produced by a cause.
Jesus**
”..The Lord our God, the Lord is one!” Deuteronomy 6:4
Then God said, “Let Us make man in Our image, according to Our likeness; let them have dominion over the fish of the sea, over the birds of the air, and over the cattle, over all the earth and over every creeping thing that creeps on the earth.”Genesis 1:26
“I am the Lord, and there is no other; There is no God besides Me.” Isaiah 45:5 Notice it is not no God besides us.
“For there is one God and one Mediator between God and men, the Man Christ Jesus,” 1 Timothy 2:5
God refers to Jesus “But to the Son He says:
“Your throne, O God, is forever and ever;”Hebrews 1:6-8
Jesus said to His disciples. “Go therefore and make disciples of all the nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit,” Matthew 28:19
Jesus spoke clearly of the Father, the Son, and the Holy Spirit. Nevertheless, if you read this verse attentively, you will see that the Three have just one name. It says, “baptizing them into the name” (not names) “of the Father, and of the Son, and of the Holy Spirit.”
There are ‘Three’ with one name. This is the Triune God, the Trinity. ONE God in “3 Persons” not and NEVER 3 Gods. We cannot understand the Trinity fully but that is how God reveals Himself to mankind – both “I” and “Us”.
Don’t forget we are finite and God is infinite – we may not fully comprehend God. BUT what God has revealed is sufficient for our salvation.
It is clear that there never was a time when nothing existed; otherwise nothing would exist now. ~ CSLewis