Authors:

Know the men who follow you and let them know you. Don't ask your men to die for a stranger.

George R. R. Martin (2012). “George R. R. Martin's A Game of Thrones 5-Book Boxed Set (Song of Ice and Fire Series): A Game of Thrones, A Clash of Kings, A Storm of Swords, A Feast for Crows, and and A Dance with Dragons”, p.192, Bantam
Know the men who follow you and let them know you. Don't ask your men to die for a stranger.