KUNG FU - ah Grasshopper

The first meeting between the young Caine and Master Po contains the following:

"Of all things, to live in darkness must be the worst." -young Caine
"Fear is the only darkness." -Master Po
"Never assume that because a man has no eyes, he cannot see." -Po
'Close your eyes. What do you hear?' -Po
'I hear the water. I hear the birds.' -young Caine
'Do you hear your own heartbeat?'
'No.'
'Do you hear the grasshopper which at your feet?'
Caine opens his eyes and looks down at his feet to see a grasshopper there. 'Old Man, how is it that you hear these things?'
'Young Man, how is it that you do not?'"