Do you want to understand? The whole world is one of your eyes, the body produced by your parents is a cataract. All ordinary people ignore the indestructible, marvelously clear, unfailingly mirroring eye, and cling fast to the dust cataract produced by the relationship of their father and mother. Therefore they take illusions for realities, and grasp at reflections as the physical forms themselves.
P’u-an, from The Zen Reader, page 41