Yunmen's Give Me the Reaching

KOAN:

A student asked, “What is the inward-and-outward radiance?”
Master Yunmen asked back, “In what direction is your question pointed?”
“What is reaching the light?”
The Master asked, “If someone suddenly asked you this, what would you say?”
The student continued, “How about after reaching the light?”
Yunmen replied, “Forget the light—give me first the reaching!”

—Record of Yunmen