Thanks for raising the question. It made me consider how I would answer it myself given my feeble understanding of the Trinity. I went straight to John 1:1-4. Even though I
sort of can get a grasp on what it says I still couldn't put into words and explanation. The use of the term "the Word" in this scripture clouds our understanding further, or for me anyway. So this morning I have been doing some more searching and reading and this is the explanation that works best in my mind. It's a little wordy and hard to read but the first few paragraphs are really the crux of the matter.
http://johnshore.com/2009/01/11/the-tri ... john-11-4/
What he is saying, I think, is that God is God. Period. But, as the writer defines the Trinity, He is a God of three parts, three in one, triune.
First there is God, the God in Heaven, God the Creator, God the Father, the giver of life, the God who has provided all we call ours, the God to whom we owe an unpayable debt, the Alpha and Omega, the Great I Am, and all the other terms we use for Him.
Then there is Jesus, "The Word", the
physical manifestation of God in Heaven that we simple minded humans (entrapped and blinded by our dimensional world, as the writer put it) needed to be able to see, touch, and hear in order to believe in. God had to be able to physically walk the earth, had to be human, had to have human thought and emotion, had to have a soul to give up on the cross to the torment of Hell to provide our salvation, had to be physically buried and resurrected, because, unfortunately, see is believing.
Then there is the Holy Spirit. God in us. His manifestation in the hearts and souls of believers. The God we lean on in our weakness, the God that provides joy and happiness, the God that guides us, corrects us, teaches us to love, calls to us, and on and on.
Again, thanks, for bringing this up. It helped to give me some clarification as well. Hope I've helped and not made it more confusing, and I hope I haven't said anything that isn't at least on the right track.