"Humbolt Fog, you are an excellent rat."
Tears welled in my eyes, and fell in the grass.
"If you can understand me, hear this: I will come back for you, But its okay if you don't wait around for me. It's Okay if you go on and find another life for yourself. You are a good rat. A kind rat. And maybe you'll be happier when you discover that the world is bigger then your little wire cage."
-The summer I learned to fly by Dana Reinhardt
( I have to admit I cried when i read that part. The rat was her best friend!)