God, it seems, cannot really be known, but only related to. Or, as the mystics would assert, we know God by loving God, by trusting God, by placing our hope in God. It is a nonpossessive, nonobjectified way of knowing. It is always I-Thou and never I-It, to use Martin Buber’s wonderfully insightful phrases. God allows us to know God only by loving God. God, in that sense, cannot be “thought.” 
Our scientifically oriented knowledge seeks to master reality, explain it, and bring it under the control of reason, but a delight in unknowing has also been part of the human experience. Even today, poets, philosophers, mathematicians, and scientists find that the contemplation of the insoluble is a source of joy, astonishment, and contentment.
.. One of the peculiar characteristics of the human mind is its ability to have ideas and experiences that exceed our conceptual grasp. We constantly push our thoughts to an extreme, so that our minds seem to elide naturally into an apprehension of transcendence. .
.. People practice their faith in myriad contrasting and contradictory ways. But a deliberate and principled reticence about God [talk] and/or the sacred was a constant theme [at the more mature levels] not only in Christianity but in the other major faith traditions until the rise of modernity in the West. People believed that God exceeded our thoughts and concepts and could be known only by dedicated practice. We have lost sight of this important insight, and this, I believe, is one of the reasons why so many Western people find the concept of God so troublesome today. . . .
.. We are seeing a great deal of strident dogmatism today, religious and secular, but there is also a growing appreciation of the value of unknowing [and unsaying].
.. There is a long religious tradition that stressed the importance of recognizing the limits of our knowledge, of silence, reticence, and awe. . . . One of the conditions of enlightenment has always been a willingness to let go of what we thought we knew in order to appreciate truths we had never dreamed of. We may have to unlearn a great deal about religion before we can move on to new insight.