The Little Prince and the Fox

"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.' Then he added ,'Go look at the roses again. You'll understand that yours is the only rose in all the world. Then come back to say good-bye, and I'll make you the gift of a secret.'
....

And he went back to the fox.
'Good-bye', he said.
'Good-bye', said the fox. 'Here is my secret. It's quite simple: One sees clearly only with the heart. Anything essential is invisible to the eyes."
'Anything Essential is invisible to the eyes' the little prince repeated, in order to remember.
'It's the time you spent on your rose that makes your rose so important' "

-The Little Prince (pg 61-64)