One of those Zen stories:

Master Kangan pointed to the sea and said to Daichi: "You speak of mind over matter—then let's see you stop those boats from sailing."

Wordlessly, the young disciple pulled the shoji screen across their view.

The Master smiled and put the shoji back into position. "You had to use your hands."

Silently, Daichi closed his eyes.

A few other zen bits on this site:
Zen Everything (young children)

Talent and Capacity