Parable: No water, no moon

When the Tenno nun studied Zen at Bucca of Engaku, it is a long time could not enjoy the fruits of meditation.
Finally, one moonlit night she was carrying water in an old pail bound with bamboo. The bamboo broke, and the bottom of the bucket fell off, and in this moment the Tenno was free!
In memory she wrote about this poem:
And so, and syak, I tried to save the old pail,
While bamboo rope is not weakened and not torn,
Until finally the bottom is not taken off.
No more water in the bucket!
No more moon in the water!