God is not...
(God) is not soul or mind, nor does it possess imagination, conviction, speech, or understanding. Nor is it speech per se, understanding per se. It cannot be spoken of and it cannot be grasped by understanding.
Dionysius the Areopagite, The Mystical Theology (links to Amazon)
Dionysius’s works are fundamental to what is called apophatic theology, which is when we approach God by stripping away everything that we have a name for. This is sometimes called negative theology, but it's important that it not be misconstrued as somehow anti theology – this is not the case. At the core of apophatic theology is the understanding that God is beyond words. Words, as a human creation, are woefully underpowered to grasp the essence of God.