Thanks for the clarification. I didn't think that the Orthodox believed that God consisted of parts, but was simple.
Regards
On revisiting what Agrarian wrote, I believe he did not mean to suggest that God was divisible, although it came across as such. He is indivisible when it comes to His nature/essence (ousia), but He is definitely distinct in His Divine Personalities (Hypostases) which is a word often mistranslated into (sub-hypo, stance-stasis), substance which means "nature" or essence in Latin.
Clrearly, we know God only through His Hypostatic economy, and not in His nature. Through the Hypostases, God communicates with us and makes Himself known to us as Spirit, Word or Wisdom.
The Orthodox tendency to concentrate on the Three Hypostases is because we cannot know God except what we know of the Hyposatic revelations. Thus, we invoke the Holy Trinity knowing that worshiping God in that way will not lead to pagan Greek humanized God, that is often seen in the West.