That life we once lived in so easily, so effortlessly. We lived it like we breathed it - in, out; in, out  not knowing that the time would come when every movement of our lives would be an effort, when we'd have to think about every step, every word, every gesture. Nothing's unconscious for me now, everything's self conscious.  -John Marsden, Checkers

I've always loved this quote ever since I read the book in 6th grade.