“They were admirable things for the observer - excellent for drawing the veil from men's motives and actions. But for the trained reasoner to admit such intrusions into his own delicate and finely adjusted temperament was to introduce a distracting factor which might throw a doubt upon all his mental results. Grit in a sensitive instrument, or a crack in one of his own high-power lenses, would not be more disturbing than a strong emotion in a nature such as his.”

“He was, I take it, the most perfect reasoning and observing machine that the world has seen, but as a lover he would have placed himself in a false position. He never spoke of the softer passions, save with a gibe and a sneer. They were admirable things for the observer- excellent for drawing the veil from men's motives and actions. But for the trained observer to admit such intrusions into his own delicate and finely adjusted temperament was to introduce a distracting factor which might throw a doubt upon all his mental results. Grit in a sensitive instrument, or a crack in one of his own high-power lenses, would not be more disturbing than a strong emotion in a nature such as his.”

“The circumstances which a man encounters with suffering are the result of his own mental inharmony.”

“The true basis and propaedeutic for all knowledge of human nature is the persuasion that a man's actions are, essentially and as a whole, not directed by his reason and its designs; so that no one becomes this or that because he wants to, though he want to never so much, but that his conduct proceeds from his inborn and inalterable character, is narrowly and in particulars determined by motivation, and is thus necessarily the product of these two factors.”

“Conversation: A fair for the display of the minor mental commodities, each exhibitor being too intent upon the arrangement of his own wares to observe those of his neighbor.”

“Colonel Cathcart was impervious to absolutes. He could measure his own progress only in relationship to others, and his idea of excellence was to do something at least as well as all the men his own age who were doing the same thing even better.”