The cases suggested by you are not in point. Fathers are honestly swayed, if really swayed, by love; and queens and judges have pretended to be swayed by the highest motives, by the clearest evidence, in order that they might kill rivals, reap rewards, and gratify revenge. But what has all this to do with the fact that he who watches the scales in which evidence is weighed knows the actual result? Let us examine your case: If a father is _consciously_ swayed by his love for his son, and for that reason says that his son is innocent, then he has not expressed his opinion. If he is unconsciously swayed and says that his son is innocent, then he has expressed his opinion. In both instances his opinion was independent of his will; but in the first instance he did not express his opinion. You will certainly see this distinction between the formation and the expression of an opinion. The same argument applies to the man who consciously has a desire to condemn. Such a _conscious_ desire cannot affect the testimony--cannot affect the opinion. Queen Elizabeth undoubtedly desired the death of Mary Stuart, but this conscious desire could not have been the foundation on which rested Elizabeth's opinion as to the guilt or innocence of her rival. It is barely possible that Elizabeth did not express her real opinion. Do you believe that the English judges in the matter of the Popish Plot gave judgment in accordance with their opinions? Are you satisfied that Napoleon expressed his real opinion when he justified himself for the assassination of the Duc d'Enghien? If you answer these questions in the affirmative, you admit that I am right. If you answer in the negative, you admit that you are wrong. The moment you admit that the opinion formed cannot be changed by expressing a pretended opinion, your argument is turned against yourself. It is admitted that prejudice strengthens, weakens and colors evidence; but prejudice is honest. And when one acts knowingly against the evidence, that is not by reason of prejudice. According to my views of propriety, it would be unbecoming for me to say that your argument on these questions is "a piece of plausible shallowness." Such language might be regarded as lacking "reverential calm," and I therefore refrain from even characterizing it as plausible.