A ninja must be zen

Master Po: "Close your eyes.  What do you hear?"

Young Caine: "I hear the water, I hear the birds."

Master Po: "Listen for the color of the sky.  Look for the sound of the hummingbird's wing. Search the air for the perfume of ice on a hot day. If you have found these things, you will know.  Do you hear your own heartbeat?"

Young Caine: "No."

Master Po: "Do you hear the grasshopper at your feet?"

Young Caine: "Old man, how is it that you hear these things?"

Master Po: "Young man, how is it that you do not?"

From the 70's TVseries Kung Fu - featured on Kid Koala/Ninja Tunes scratchappyland. Pic from Supremefreak Magazine.