Conn Iggulden said this quote

If he had learned anything from his father’s fate, it was to win, no matter how you did it. It was not important if someone else was hurt, or killed. If you won, you would be forgiven anything. You could be taken from a stinking ger and forced through the ranks until a thousand men followed your orders as if they came from the khan himself. Blood and talent. The nation was built on both.