Hebrews 1: Father and Son
The beginning of Hebrews 1 sets out the difference between Jesus Christ and the rest of creation. The first difference is that Jesus was not created.
Heb 1:1 God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,
Heb 1:2 Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;
Heb 1:3 Who being the brightness of his glory, and the express image of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high;
Heb 1:4 Being made so much better than the angels, as he hath by inheritance obtained a more excellent name than they.
Jesus Christ was the brightness of God. He was not simply a bearer of the brightness of God, but He was the brightness itself. He was the exact image of the person of God. He was and is God Himself. He was not a part of the created order.
This is hard for a lot of people to try to wrap their minds around. Naturally, we have two persons of the Trinity here with the third person being the Holy Spirit. How do we understand our God is one God but three persons?
I find that analogy is often the most effective way to understand the idea of the Trinity even though analogy is admittedly an imperfect reflection of reality. At least it helps a little bit for our finite minds.
It makes me think about Dorothy Sayers. Her argument is essentially that human creativity and can help us represent the Trinity. When an author is writing a book, there is an idea and the mind of the author. The book exists in the mind of the author. However, that both then becomes a different form written on paper. It is identical to the idea, but it is a distinct entity. Finally, when another person reads that same book, it is still the same book and idea, but it is the form in which it is communicated to the other person.
This type of illustration has helped me think through the issue of the Trinity, but always remember that every analogy is imperfect. It is much more important to understand that the Trinity is a reality than to develop a perfect analogy for it because that analogy is not going to be found.