in a pit with a lion on a snowy day

Man, that's got to be one of the best book titles ever. I had heard about the book, and heard a talk from Mark Batterson online a while back. But I just got the book, and I am digging it.

I find myself asking some tough questions to my heart and soul. Good stuff, but the kind of things that get me all stirred up on the inside. I want to be the kind of person who lives life to the fullest, who (in Batterson's words) chases the lion. I think I play it safe all too often, settling for secure, with a little glimpse of the adventure.

There's a part of me that resonates with Thoreau:

I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived. I did not wish to live what was not life, living is so dear; nor did I wish to practise resignation, unless it was quite necessary. I wanted to live deep and suck out all the marrow of life...

What are you reading that's making you re-think the way you're living your life?