But it must be remembered that, in spite of the proverb, it takes in reality only one to make a quarrel. It is useless for the sheep to pass resolutions in favour of vegetarianism, while the wolf remains of a different opinion.
William Ralph Inge (1860-1954) English prelate [Dean Inge]
“Patriotism,” Outspoken Essays: First Series (1915)
Sometimes quoted as "while wolves remain of a different opinion."