“He was a killer, a thing that preyed, living on the things that lived, unaided, alone, by virtue of his own strength and prowess, surviving triumphantly in a hostile environment where only the strong survive.”

“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.”

“The first theft marked Buck as fit to survive in the hostile Northland environment. It marked his adaptability, his capacity to adjust himself to changing conditions, the lack of which would have meant swift and terrible death. It marked, further, the decay or going to pieces of his moral nature, a vain thing and a handicap in the ruthless struggle for existence.”

“They were his environment, these men, and they were moulding the clay of him into a more ferocious thing than had been intended by Nature. Nevertheless, Nature had given him plasticity. Where many another animal would have died or had its spirit broken, he adjusted himself and lived, and at no expense of the spirit.”

“They alone moved through the vast inertness. They alone were alive, and they sought for other things that were alive in order that they might devour them and continue to live.”

“The trouble with him was that he was without imagination. He was quick and alert in the things of life, but only in the things, and not in the significances. Fifty degrees below zero meant eighty-odd degrees of frost. Such fact impressed him as being cold and uncomfortable, and that was all. It did not lead him to meditate upon his frailty as a creature of temperature, and upon man's frailty in general, able only to live within certain narrow limits of heat and cold; and from there on it did not lead him to the conjectural field of immortality and man's place in the universe.”

“Life is a strange thing. Why this longing for life? It is a game which no man wins. To live is to toil hard and to suffer sore, till old age creeps heavily upon us and we throw down our hands on the cold ashes of dead fires. It is hard to live. In pain the babe sucks his first breath, in pain the old man gasps his last, and all his days are full of trouble and sorrow; yet he goes down to the open arms of death, stumbling, falling, with head turned backward, fighting to the last. And death is kind. It is only life and the things of life that hurt. Yet we love life and we hate death. It is very strange.”