That which I can possibly understand is not the Divine.
We have here a negative sort of definition.
This is a warning to a category of persons who are self-deluded by their commonsense logic into believing that they have achieved a certain grasp of what God is.
God is that which cannot be grasped, and any claim to have done so can only be mistaken.
–Rabbi Adin Steinsaltz
From The Sustaining Utterance, p. 84, by Rabbi Adin Steinsaltz