Stories.

Stories, like people and butterflies and songbird's eggs and human hearts and dreams, are also fragile things, made up of nothing stronger or more lasting than twenty-six letters and a handful of punctuation marks. Or they are words on the air, composed of sounds and ideas- abstract, invisible, gone once they are spoken- and what could be more frail than that? But some stories, small simple ones about setting out on adventures or people doing wonders, tales of miracles and monsters, have outlasted all the people who told them, and some of them have outlasted the lands in which they were created.

-Neil Gaiman, Fragile Things.