The wise Zen teacher was walking on the mountain pass with one of his young students.
The teacher kept silent while the student spoke the entire time of Zen and the mind. After some distance the two men reached a giant boulder.
The teacher inquired softly of the student, “There is a big stone. Do you consider it to be inside or outside your mind?”
The student replied confidently, “In Zen everything is an objectification of the mind. Therefore I would say that the stone is certainly within my mind.”
The teacher smiled. “Your head must be very heavy, if you are carrying a rock like that in your mind.” The two walked the rest of the way in peaceful silence.