Oh no, this is difficult. I have a lot of favorite quotations, and most of them are from "The Little Prince" by Antoine de Saint-Exupery. Most of them were said by the fox, which happened to be my favorite character in the book.
Here are some:
"But I, alas, do not know how to see sheep through the walls of boxes. Perhaps I am a little like the grown-ups."
-- the aviator in "The Little Prince" by Antoine de Saint-Exupéry (Ch4)
“Go and look again at the roses. You will understand now that yours is unique in all the world.”
-- the fox in "The Little Prince" by Antoine de Saint-Exupéry (Ch21)
“You are not at all like my rose,” he said. “As yet you are nothing. No one has tamed you, and you have tamed no one. You are like my fox when I first new him. He was only a fox like a hundred thousand other foxes. But I have made him my friend, and now he is unique in all the world.”
-- the prince in "The Little Prince" by Antoine de Saint-Exupéry (Ch21)
“You are beautiful, but you are empty,” he went on. “One could not die for you. To be sure, an ordinary passerby would think that my rose looked just like you– the rose that belongs to me. But in herself alone she is more important than all the hundreds of you other roses: because it is she that I have watered; because it is she that I have put under the glass globe; because it is she that I have sheltered behind the screen; because it is for her that I have killed the caterpillars (except the two or three that we saved to become butterflies); because it is she that I have listened to, when she grumbled, or boasted, or even sometimes when she said nothing. Because she is my rose."
-- the prince in "The Little Prince" by Antoine de Saint-Exupéry (Ch21)
"It is only with the heart that one can see rightly; what is essential is invisible to the eye.”
--the fox in "The Little Prince" by Antoine de Saint-Exupéry (Ch21)
“It is the time you have wasted for your rose that makes your rose so important... You become responsible, forever, for what you have tamed.” ---the fox in "The Little Prince" by Antoine de Saint-Exupéry (Ch21)