Your only obligation in any lifetime is to be true to yourself. Being true to anyone else or anything else is not only impossible, but the mark of a fake messiah.
“Because I'm such a creative person, and I've always got my nose in a book, I suppose it was only a matter of time before non-fiction turned into fiction again. But I never consciously set out to become a writer and I never thought I'd be doing the things I'm doing today.”