“There is an opinion that parties in free countries are useful checks upon the administration of the government, and serve to keep alive the spirit of liberty. This, within certain limits, is probably true. But in governments of a popular character, and purely elective, it is a spirit not to be encouraged. From their natural tendency, there will always be enough of that spirit for every salutary purpose. And there being constant danger of excess, the effort ought to be, by force of public opinion, to mitigate and assuage it. A fire not to be quenched, it demands a uniform vigilance to prevent it bursting into a flame, lest, instead of warming, it should consume.”