Scripture that changed my life? Realizing Jesus' role, specifically, before He was a man. It also marks the point when I realised who God is. I don't 'see' the "Trinity" anymore; I see 1 God broken for us, who came to His creation, dies for His creation, who conquered death and rose, so that His creation can be saved.

Genesis 1:1
1In the beginning God created the heaven and the earth.
John 1-5; 14
1In the beginning was the Word, and the Word was with God, and the Word was God. 2The same was in the beginning with God. 3All things were made by him; and without him was not any thing made that was made. 4In him was life; and the life was the light of men. 5And the light shineth in darkness; and the darkness comprehended it not.
14And 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.

Like seriously? Jesus IS the Word. Every time the older testament says "...the Word of the LORD..." that's Jesus.
The very Utterance, the very Breath, the very Word of God is our Saviour; is our Lord.
Creation and Jesus can not exist apart from each other. v.3 "ALL things were made by Him." Creation in its entirety. v4. "In Him was Life." Man has life because of the breath of God, because of Jesus; and we have been made alive by accepting His resurrection.

It was a good day when v14 "The Word was made flesh," sunk in. My faith changed that day, and I never look back.

Jesus IS Lord