"Goodbye," said the fox.
"And now here is my secret, a very simple secret:
It is only with the heart that one can see rightly;
what is essential is invisible to the eye."

"What is essential is invisible to the eye,"
the little prince repeated,
so that he would be sure to remember.

All the chickens are just alike, and all the men are just alike.  And, in consequence, I am a little bored.  But if you tame me, it will be as if the sun came to shine on my life.  I shall know the sound of a step that will be different from all the others.  Other steps send me hurrying back underneath the ground.  Yours will call me, like music, out of my burrow.