Your head must be very heavy!

Ch’an master Fa-yen interrupted an argument among some monks concerning the relationship of mind to reality by posing to them a question: “Over there is a large boulder. Do you say that it is inside or outside your mind?” One of the monks replied, “From the Buddhist viewpoint everything is an objectification of mind, so that I would have to say that the stone is inside my mind.” Quipped Fa-yen, “Your head must be very heavy!”