The conversation between human and AI assistant.
[|Human|] Give me a popular quote from book, "The Little Prince".
[|AI|] The Little Prince might look like a children's book from cover, it is a book with full of wisdom bits for all readers. One of the most referred quote is "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."
[|Human|] 
Give me a popular quote from book, "The Little Prince".