Ursula K. Le Guin, on books and reading:

As you read a book word by word and page by page, you participate in its creation, just as a cellist playing a Bach suite participates, note by note, in the creation, the coming-to-be, the existence, of the music.

And, as you read and re-read, the book of course participates in the creation of you, your thoughts and feelings, the size and temper of your soul.

– Ursula K. Le Guin.