1:15-23 of this letter is believed to have been used as a doxology for the early church. A doxology is a expression of praise to God. This praise says that Jesus is:
the image of the invisible God
the firstborn of all creation
creator of all things (visible and invisible)
before all things
holding all things together
head of the body (the church)
the beginning
the firstborn of the dead
first place in everything
It was the Father’s good pleasure that
all the fullness (of deity) should dwell in him
to reconcile all thing through him
to make peace through his blood
reconciled all through his death
to present us before him (God) holy and blameless
This is quite a list of praise! Is there any doubt when you read this that Jesus is God? The great mystery and distinctive of the Christian faith is that God is triune–three in one. One being in essence made up of three persons. The math does not seem to work, but God is bigger than our math and his being transcends the capability of our minds to grasp.
The triune God, rather than being a problem, actually helps explain all sorts of aspects of creation and life that otherwise would be hard to understand. But the creation reflects God’s character and so you have unity in diversity everywhere you look. You have interdependence everywhere you turn. The more we learn about the universe the more we realize it is bigger than we can measure. Why would we expect otherwise from a Creator who is bigger than we can understand?!