"Draw with the eyes of the heart"
Drawing the outer surface of an object or drawing the inside,the appearance of the work is completely different.
The phrase at the upper side is a quote from words of a fox in "The Little Prince" by Saint-Exupéry'.
Now let me tell you a secret.
It's very easy.
Things,you can't see well
unless you look with your heart.
The most important thing is invisible.