“Neither force, nor argument, nor opinion," said Merlyn with the deepest sincerity, "are thinking. Argument is only a display of mental force, a sort of fencing with points in order to gain a victory, not for truth. Opinions are the blind alleys of lazy or of stupid men, who are unable to think. If ever a true politician really thinks a subject out dispassionately, even Homo stultus will be compelled to accept his findings in the end. Opinion can never stand beside truth. At present, however, Homo impoliticus is content either to argue with opinions or to fight with his fists, instead of waiting for the truth in his head. It will take a million years, before the mass of men can be called political animals.”

“Truth gains more even by the errors of one who, with due study and preparation, thinks for himself, than by the true opinions of those who only hold them because they do not suffer themselves to think…”

“When I hear another express an opinion which is not mine, I say to myself, he has a right to his opinion, as I to mine. Why should I question it? His error does me no injury, and shall I become a Don Quixote, to bring all men by force of argument to one opinion? ...Be a listener only, keep within yourself, and endeavor to establish with yourself the habit of silence, especially in politics.”

“The peculiarity of the evidence of mathematical truths is, that all the argument is on one side. There are no objections, and no answers to objections. But on every subject on which difference of opinion is possible, the truth depends on a balance to be struck between two sets of confliting reasons. Even in natural philosophy, there is always some other explanation possible of the same facts; some geocentric theory instead of heliocentric, some phlogiston instead of oxygen; and it has to be shown why that other theory cannot be the true on: and until this is shown, and until we know how it is shown, we do not understand the grounds of our opinion. But when we turn to subjects infinitely more complicated, to morals, religion, politics, social relations, and the business of life, three-fourths of the arguments for every disputed opinion consist in dispelling the appearances which favour some opinion different from it.”

“Dictionary: Opinion presented as truth in alphabetical order.”

“the general or prevailing opinion in any subject is rarely or never the whole truth; it is only by the collision of adverse opinions that the remainder of the truth has any chance of being supplied”