Bodhidharma sits facing the wall. A monk comes to him for aid.

The monk says: "I have studied and practiced for years, yet my mind is not pacified. Master, please pacify my mind."

Bodhidharma says: "Show me your mind, I will pacify it for you."

The monk says: "When I search for my mind I cannot find it."

Bodhidharma says: "There, it's pacified."