Listen for the color of the sky.
Look for the sound of a 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?
(No.)
Do you hear the grasshopper that is at your feet?

(Old man, how is it that you hear these things?)

Young man, how is it that you do not?