“God” is an ambiguous word in our language because it appears to refer to something that is known. But the transcendent is unknowable and unknown. God is transcendent, finally, of anything like the name “God.” God is beyond names and forms. Meister Eckhart said that the ultimate and highest leave-taking is leaving God for God, leaving your notion of God for an experience of that which transcends all notions.
The mystery of life is beyond all human conception. Everything we know is within the terminology of the concepts of being and not being, many and single, true and untrue. We always think in terms of opposites. But God, the ultimate, is beyond the pairs of opposites, that is all there is to it.
–Joseph Cambell, The Power of Myth