Eastern Orthodox Christians hold that there are three things that God is comprised of: the Essence, the Energies, and the Hypostasis. The Essence of God is entirely unknowable in Eastern Orthodoxy. The energies are the uncreated light or actions of God. The Hypostasis is the persons who are distinct but are related to the Divine essence. Now what is the problem with all this?
Well it seems to me that there is at least one thing they know about the Divine Essence, namely, that they cannot know anything about it. They would end up knowing something about a unknowable thing which is a contradiction. Contradictions are necessarily false and this view of the Divine Essence is contradictory. Therefore, it would seem to follow that Eastern Orthodoxy which embraces this view of the Divine Essence is necessarily false.