And he is before all things, and by him all things consist. And he is the head of the body, the church: who is the beginning, the firstborn from the dead; that in all things he might have the preeminence. Colossians 1:17-18 KJV
Talking about Jesus, the Preeminent of all things.
He was/is before ALL things.
All things consist by Him.
In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him; and without him was not any thing made that was made. In him was life; and the life was the light of men. John 1:1-4 KJV
He is the Head of the Church because He is the First-born from the dead of all who enter into covenant with His