Enlightenment is like the moon reflected on the water

Enlightenment is like the moon reflected on the water. 
The moon does not get wet, nor is the water broken.
 Although its light is wide and great, the moon is reflected
 even in a puddle an inch wide. The whole moon
 and the entire sky are reflected in dewdrops on the grass, 
or even in one drop of water. Enlightenment does not divide you,
 just as the moon does not break the water. 

You cannot hinder enlightenment, just as a drop of water
 does not hinder the moon in the sky. The depth of the drop 
is the height of the moon. Each reflection, however long
 or short its duration, manifests the vastness of the dewdrop, 
and realizes the limitlessness of the moonlight in the sky.

~ Dogen Zenji (1200 - 1253)