If I were a book, you will put me in a bookshelf after you’ve read me. Later, I’ll probably lie in an attic and find my way to a library. My life would span a few decades, or even more. If I’m exceptionally good, I’ll be a timeless classic. If I were your personal diary, I will probably last your lifetime, even if you stop using me after a while. You’ll keep me under lock and key, and no one else will read it. You will always treasure me.