The sage lectured brilliantly

The sage lectured brilliantly.

Before him, two images:

"Now this one is a devil,

And this one is me."

He turned away.

Then a cunning pupil

Changed the positions.

Turned the sage again:

"Now this one is a devil,

And this one is me."

The pupils sat, all grinning,

And rejoiced in the game.

But the sage was a sage.