... on principle, it is quite wrong to try founding a theory on observable magnitudes alone. In reality the very opposite happens. It is the theory which decides what we can observe.
I have argued with him on almost every subject in the world, and we have always been on opposite sides, without affectation or animosity... It is necessary to disagree with him as much as I do, in order to admire him as I do; and I am proud of him as a foe even more than as a friend.
When "everyone knows" that something is so, it is always more interesting and often illuminating to assumeexactly the opposite, and to see where that leads.
Where there is happiness, there is found pleasure in nonsense. The transformation of experience into its opposite, of the suitable into the unsuitable, the obligatory into the optional (but in such a manner that this process produces no injury and is only imagined in jest), is a pleasure.
Everything desires not like but unlike: for example, the dry desires the moist, the cold the hot, the bitter the sweet, the sharp the blunt, the void the full, the full the void, and so of all other things; for the opposite is the food of the opposite, whereas like receives like receives nothing from like.
Different though the sexes are, they inter-mix. In every human being a vacillation from one sex to the other takes place, and often it is only the clothes that keep the male or female likeness, while underneath the sex is very opposite of what it is above.
Bowing down in blind credulity, as is my custom, before mere authority and the tradition of the elders, superstitiously swallowing a story I could not test at the time by experiment or private judgment, I am firmly of the opinion that I was born on the 29th of May, 1874, on Campden Hill, Kensington; and baptised according to the formularies of the Church of England in the little church of St. George opposite the large Waterworks Tower that dominated that ridge.
Rhetoric is useful because the true and the just are naturally superior to their opposites, so that, if decisions are improperly made, they must owe their defeat to their own advocates; which is reprehensible. Further, in dealing with certain persons, even if we possessed the most accurate scientific knowledge, we should not find it easy to persuade them by the employment of such knowledge. For scientific discourse is concerned with instruction, but in the case of such persons instruction is impossible.