Best line from Chapter four in The Fault in Our Stars

I think the best line from chapter four was the very last line, "'That's the thjing about pain, "Augustus said, and then glanced back at me, 'It demands to be felt."  I really like this line because it really explains how powerful pain can be.  Augustus is always saying wise and inspirational things to Hazel, but so far I think this line makes the biggest impact on the reader.  When I read this line, I had to stop and think about it for a minute.  When you feel pain, whether its a papercut or a broken bone, it doesnt go away immediately.  It stays for a while.  I think pain is very demanding, it consumes your attention.