Animals chew their cud to make their food more and more digestible. The mind can be like this… constantly regurgitating the same old stuff over and over again to make it more digestible and easier to swallow. The mind loves and craves safety, comfort and security. It always prefers to resort to what it already knows.
Questions are one of the most effective ways of disturbing the swampy calm of a calloused mind. Questions undermine its false security and open it up to new ways of being, thinking and perceiving. Questions can convert the mind from just knowledgeable to wise.