Pain

THAT WAS HOW the little prince tamed the fox. And when the time to leave was near:

"Ah!" The fox said. "I shall weep."
"It's your own fault," the little prince said. "I never wanted to do you any harm, but you insisted that I tame you. . ."
"Yes, of course," the fox said.
"But you're going to weep!" said the little prince.
"Yes, of course." the fox said.
"Then you get nothing out of it?"
"I get something," the fox said, "because of the color of the wheat. Go look at the roses again. You'll understand that yours is the only rose in the world."