“Intelligent men are cruel. Stupid men are monstrously cruel. ”

“He became quicker of movement than the other dogs, swifter of foot, craftier, deadlier, more lithe, more lean with ironlike muscle and sinew, more enduring, more cruel more ferocious, and more intelligent. He had to become all these things, else he would not have held his own nor survived the hostile environment in which he found himself.”

“Morrell, ever a true comrade, too had a splendid brain. In fact, and I who am about to die have the right to say it without incurring the charge of immodesty, the three best minds in San Quentin from the Warden down were the three that rotted there together in solitary. And here at the end of my days, reviewing all that I have known of life, I am compelled to the conclusion that strong minds are never docile. The stupid men, the fearful men, the men ungifted with passionate rightness and fearless championship - these are the men who make model prisoners. I thank all gods that Jake Oppenheimer, Ed Morrell, and I were not model prisoners.”

“...men, groping in the Arctic darkness, had found a yellow metal, and because steamship and transportation companies were booming the find, thousands of men were rushing into the Northland. These men wanted dogs, and the dogs they wanted were heavy dogs, with strong muscles by which to toil, and furry coats to protect them from the frost.”

“Sitka Charley started. There had been more than one shot, yet there was but one other rifle in the party. He gave a fleeting glance at the men who lay so quietly, smiled viciously at the wisdom of the trail, and hurried on to meet the Men of the Yukon.”

“Wolf - tis what he is. He's not blackhearted like some men. 'Tis no heart he has at all.”

“She was thrilling to a desire that urged her to go forward, to be in closer to that fire, to be squabbling with the dogs, and to be avoiding and dodging the stumbling feet of men.”