xxxHOLiC Ep 17

It was a heavily dialogue-wised episode that had to do with some philosophical themes.
Why would one refuse to accept happiness?
Why would anyone risk themselves into something that will hurt themselves?
Why would anyone do the things that they are not supposed to do?
These were the questions brought up in this episode, which were quite powerful. I heard that this episode is based on the novel of xxxHOLiC. (didn't know there was a novel adaptation of the series) Anyway even with mostly dialogues, this was another powerful episode I will say.