Whispering to each handhold, “I'll be back,”  
I go up the cliff in the dark. One place  
I loosen a rock and listen a long time  
till it hits, faint in the gulf, but the rush  
of the torrent almost drowns it out, and the wind—  
I almost forgot the wind: it tears at your side  
or it waits and then buffets; you sag outward. . . .  
 
 
I remember they said it would be hard. I scramble  
by luck into a little pocket out of  
the wind and begin to beat on the stones  
with my scratched numb hands, rocking back and forth  
in silent laughter there in the dark—  
“Made it again!” Oh how I love this climb!  
—the whispering to stones, the drag, the weight  
as your muscles crack and ease on, working  
right. They are back there, discontent,  
waiting to be driven forth. I pound  
on the earth, riding the earth past the stars:  
“Made it again! Made it again!”
William Stafford
http://www.poemhunter.com/poem/after-arguing-against-the-contention-that-art-must-come-from-discontent/