"Let me tell you something about wolves, child. When the snow falls and the while winds blow, the lone wof dies, but the pack survives. Summer is the time for squabbles. In winter, we must protect one another, keep each other warm, share our strengths. So, if you must hate, Arya, hate those who would truly do us harm."
A game of thrones, Book one of a song of ice and fire. George R.R. Martin