Pray for the welfare of the government, since if not for the fear of it, a person would swallow his fellow man alive. (Rabbi Chanina, Pirkei Avoth 3:2)
This quote comes from the Pirkei Avoth (Hebrew: Chapters of the Fathers, פרק×? ×?×?×?ת ) or simply Avoth is a tractate of the Mishna composed of ethical maxims of the Rabbis of the Mishnaic period. It is the second-last tractate in the Mishnaic order Nezikin. (Source wikipedia)