"When our genes were unable to store all the information necessary for our survival, we slowly invented the needed genes.
But then there came a time, perhaps ten thousand years ago, when there arose a need to know more than it was convenient for our brains to hold. And so we learned to store vast quantities of information outside our bodies.
We are the only species on the planet, at least as far as we know, that has invented a communal memory that is stored neither in our genes nor in our brains. The place where this memory is kept is called a library.
A book is made from a tree. You give it a single glance, and you hear the voice of a person who may have been dead for a thousand years. Across millennia, the author speaks, quietly and clearly, directly into your head, personally to you.
Writing is perhaps the greatest of human inventions, for it binds together people who are citizens of different epochs and who have never known one another.
Books break the shackles of time; they are proof that humanity is capable of magic."
Carl Sagan,"Cosmos"