Just finished Jennifer Government by Max Barry last night. Not a particularly quotable book in the normal sense, but this bit struck me as interesting:
Today is a great day, Buy thought.
The funny part was that only a month or two ago he'd been ready to kill himself. He was still walking around only because he didn't know enough about guns to locate the safety on a Colt .45. Everything since then, you could argue, was borrowed time.
It goes on to use the I am a great person and Every obstacle is an opportunity bits and build around those, but this bit stuck out as being semi-quotable and also a little funny in that it's a weird world in which you call someone you know in the government to ask them how to take the safety off of a gun so you can shoot yourself in the facehole.
Still working on Meditations Book 7, will come back with more when I have done some more work there, I needed to get this book finished first for book club meeting soon.
ETA We both had gun related quotes and both have something to do with shooting oneself. My character wanted to but couldn't, yours seems fully capable but has some unfinished business to attend to first.