Authors:

Now you know " the crow whispered as it sat on his shoulder. "Now you know why you must live." "Why " Bran said not understanding falling falling. "Because winter is coming.

George R. R. Martin (2011). “A Game of Thrones 4-Book Bundle: A Song of Ice and Fire Series: A Game of Thrones, A Clash of Kings, A Storm of Swords, and A Feast for Crows”, p.155, Bantam
Now you know  the crow whispered as it sat on his shoulder. Now you know why you must live. Why  Bran said not understanding falling falling. Because winter is coming.