One day, an army general invited the Buddhist monk I-Hsiu
(literally, "One Rest") to his military head office for a
dinner. I-Hsiu was not accustomed to wearing luxurious
clothings and so he just put on an old ordinary casual
robe to go to the military base. To him, "form is void".

As he approached the base, two soldiers appeared before him
and shouted, "Where does this beggar came from? Identify
yourself! You do not have permission to be around here!"

"My name is I-Hsiu Dharma Master. I am invited by your
general for a supper."

The two soldiers examined the monk closely and said, "You
liar. How come my general invites such a shabby monk to
dinner? He invites the very solemn venerable I-Hsiu to our
base for a great ceremony today, not you. Now, get out!"

I-Hsiu was unable to convince the soldiers that he was
indeed the invited guest, so he returned to the temple
and changed to a very formal solemn ceremonial robe for
the dinner. And as he returned to the military base, the
soldiers observed that he was such a great Buddhist monk,
let him in with honour.

At the dinner, I-Hsiu sat in front of the table full of
food but, instead of putting the food into his month, he
picked up the food with his chopsticks and put it into
his sleeves. The general was curious, and whispered to
him, "This is very embarrassing. Do you want to take
some food back to the temple? I will order the cook to
prepare some take out orders for you." "No" replied the
monk. "When I came here, I was not allowed into the
base by your soldiers until I wear this ceremonial robe.
You do not invite me for a dinner. You invite my robe.
Therefore, my robe is eating the food, not me."
[ Dining with a General - a Zen Buddhism Koan ]