Heart of Jesus, in who dwells all the fullness of the Divinity, have mercy on us.

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 was not anything made that was made. (John 1:1–3)

I love this passage. While there are many passages in the Gospel that show the Divinity of Jesus, this one is something special. It is a direct allusion to the very beginning of the Bible: In the beginning God created the heavens and the earth. (Genesis 1:1)