The Saturday Zen Story (The moon cannot be stolen)

What is your interpretation of this one?

A Zen Master lived the simplest kind of life in a little hut at the foot of a mountain. One evening, while he was away, a thief sneaked into the hut only to find there was nothing in it to steal. The Zen Master returned and found him. "You have come a long way to visit me," he told the prowler, "and you should not return empty handed. Please take my clothes as a gift." The thief was bewildered, but he took the clothes and ran away. The Master sat naked, watching the moon. "Poor fellow," he mused, " I wish I could give him this beautiful moon."