“Their hate bound them together as love could never bind.”

“No; I did not hate him. The word is too weak. There is no word in the language strong enough to describe my feelings. I can say only that I knew the gnawing of a desire for vengeance on him that was a pain in itself and that exceeded all the bounds of language. ”

“…and from that moment Buck hated him with a bitter and deathless hatred.”

“The eyes themselves were of that baffling protean gray which is never twice the same; which runs through many shades and colorings like intershot silk in sunshine; which is gray, dark and light, and greenish gray, and sometimes of the clear azure of the deep sea. They were eyes that masked the soul with a thousand guises, and that sometimes opened, at rare moments, and allowed it to rush up as though it were about to fare forth nakedly into the world on some wonderful adventure -- eyes that could brood with the hopeless somberness of leaden skies; that could snap and crackle points of fire like those that sparkle from a whirling sword; that could grow chill as an arctic landscape, and yet again, that could warm and soften and be all adance with love-lights, intense and masculine, luring and compelling, which at the same time fascinate and dominate women till they surrender in a gladness of joy and of relief and sacrifice.”

“Like had been replaced by love. And love was the plummet dropped down into the deeps of him where like had never gone. And responsive out of his deeps had come the new thing—love. That which was given unto him did he return. This was a god indeed, a love–god, a warm and radiant god, in whose light White Fang's nature expanded as a flower expands under the sun.”

“The hand descended. Nearer and nearer it came. It touched the ends of his upstanding hair. He shrank down under it. It followed down after him, pressing more closely against him. Shrinking, almost shivering. He still managed to hold himself together. It was a torment, this hand that touched him and violated his instinct. He could not forget in a day all the evil that had been wrought him at the hands of men.”

“This man had saved his life, which was something; but, further, he was the ideal master. Other men saw to the welfare of their dogs from a sense of duty and business expediency; he saw to the welfare of his as if they were his own children, because he could not help it. And he saw further. He never forgot a kindly greeting or a cheering word, and to sit down for a long talk with them ("gas" he called it) was as much his delight as theirs. He had a way of taking Buck's head roughly between his hands, and resting his own head upon Buck's, of shaking him back and forth, the while calling him ill names that to Buck were love names. Buck knew no greater joy than that rough embrace and the sound of murmured oaths, and at each jerk back and forth it seemed that his heart would be shaken out of his body so great was its ecstasy. And when, released, he sprang to his feet, his mouth laughing, his eyes eloquent, his throat vibrant with unuttered sound, and in that fashion remained without movement, John Thornton would reverently exclaim, "God! you can all but speak!"Buck had a trick of love expression that was akin to hurt. He would often seize Thornton's hand in his mouth and close so fiercely that the flesh bore the impress of his teeth for some time afterward. And as Buck understood the oaths to be love words, so the man understood this feigned bite for a caress.”