I learned a long time ago that it is much easier to find out what Zen is about by reading a book on Zen (book Zen?) than it is to achieve kenshō seeing firsthand Zen’s secret. One side favors the intellect while the other demands intuition, that is, the complete and total letting go of all presuppositions so that one is open to the arrival of truth.
The koans that students of Zen love so well are really talking to our intuition even demanding that we drop the intellect. In fact, the more we try to use the intellect to answer the koan the more frustrating it becomes until we come to some kind of crisis where we have to accept that the koan has no intellectual answer.
If we are willing to accept the verdict that Zen is exclusively for our intuition and not for the intellect, we will go a long way in Zen and might eventually attain enlightenment. On the other hand, the arguments against intuition will come exclusively from the intellect, that is, an intellect that refuses to be subservient to intuition and intuition's role in Zen.
I have seen this countless times with people who argue trying to push an intellectual understanding of Zen which is really not in Zen. Apparently, they are not aware that the intellect only involves conceptual understanding.
Intuition, on the other hand, is the sudden act of coming to direct knowledge without reliance on the intellect. If the intellect plays any role in Zen it is to wet our spiritual appetite for Zen. But it should not be used to fulfill Zen’s primary goal of kenshō.