Hazel is different. She walks lightly, old man. She walks lightly upon the earth. Hazel knows the truth: We’re as likely to hurt the universe as we are to help it, and we’re not likely to do either. 

People will say it’s sad that she leaves a lesser scar, that fewer will remember her, that she was loved deeply but not widely. But it’s not sad, Van Houten. It’s triumphant. It’s heroic. Isn’t that the real heroism? Like the doctors say: First, do no harm.

 -John Green, The Fault in Our Stars