A Zen story from somewhere in the net

Jizô asked Hôgen, “Where are you going, senior monk?”
Hôgen said, “I am on pilgrimage, following the wind.”
Jizô said, “What are you on pilgrimage for?”
Hôgen said, “I don’t know.”
Jizô said, “Not knowing is most intimate.”
Hôgen suddenly attained great enlightenment.