If God doesn't exist, then how can we know Who He is? After all, I have nothing wrong with saying that God eternally existed because God is infinite, by His own nature.
Theo, I don't wish to confuse anyone in making my statement above that 'God does not exist'. We say that 'God exists' when trying to describe God in human terms and understanding, as it is much more conductive to conversation and debate to say 'God exists' when trying to relate our belief in the 'I AM'. In such a way, it is not strictly wrong to say it in such a way, as it is the best way we beings, who are created and limited in our created natures, can understand God and can more easily relate to Him.
But there are deeper theological and divine truths which God has revealed to the true theologians (and by true theologians, I am ascribing to those who fulfill such a requirement as being people who pray
in truth -of which I confess I do not). These are glimpses of God revealed to His greatest of saints, such as Saint Maximus for one, men and women who have reached depths of the knowledge of God deeper than most people have been able to reach in this world.
These are truths that cannot be attained simply by the mind or the thought of man, but by the divine revelation of God to the
nous through pure prayer.
That 'God does not exist' does not mean that there is no God and that He cannot be known, but rather, that he does not 'exist' as we exist or that anything in the created universe exists. Nothing can exist in itself. And that is why the logical progression of cause and effect if one goes back far enough leads to God. God is the 'I AM' in a way that transcends creation and 'existence' as far as created knowledgeable beings can relate to and comprehend. It is not a deficiency in God to say that He 'does not exist' in such a way, but rather it highlights the deficiency in our capability to understand the essence of God.
We must first differentiate the
essence of God and the
energy of God. God is unknowable in His essence. We created beings cannot understand the essence of God. It is impossible. There is an uncrossable chasm between our essence and of God as He is in His uncreated essence.
We can, however,
know God through His energies, which are the natural uncreated energies of His essence. By His energy we can experience and known God and His nature and can partake of His divine nature and become living temples of His Holy Spirit.