“[Speaking to a group of wealthy New Yorkers]A million years ago, the cave man, without tools, with small brain, and with nothing but the strength of his body, managed to feed his wife and children, so that through him the race survived. You on the other hand, armed with all the modern means of production, multiplying the productive capacity of the cave man a million times — you are incompetents and muddlers, you are unable to secure to millions even the paltry amount of bread that would sustain their physical life. You have mismanaged the world, and it shall be taken from you. ”

“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.”

“Why, if there is anything in supply and demand, life is the cheapest thing in the world. There is only so much water, so much earth, so much air; but the life that is demanding to be born is limitless. Nature is a spendthrift. Look at the fish and their millions of eggs. For that matter, look at you and me. In our loins are the possibilities of millions of lives. Could we but find time and opportunity and utilize the last bit and every bit of the unborn life that is in us, we could become the fathers of nations and populate continents. Life? Bah! It has no value. Of cheap things it is the cheapest. Everywhere it goes begging. Nature spills it out with a lavish hand. Where there is room for one life, she sows a thousand lives, and it's life eats life till the strongest and most piggish life is left.”

“Do you know the only value life has is what life puts upon itself? And it is of course overestimated, for it is of necessity prejudiced in its own favour. Take that man I had aloft. He held on as if he were a precious thing, a treasure beyond diamonds of rubies. To you? No. To me? Not at all. To himself? Yes. But I do not accept his estimate. He sadly overrates himself. There is plenty more life demanding to be born. Had he fallen and dripped his brains upon the deck like honey from the comb, there would have been no loss to the world. The supply is too large.”

“Who are you, Martin Eden? he demanded of himself in the looking- glass, that night when he got back to his room. He gazed at himself long and curiously. Who are you? What are you? Where do you belong? You belong by rights to girls like Lizzie Connolly. You belong with the legions of toil, with all that is low, and vulgar, and unbeautiful. You belong with the oxen and the drudges, in dirty surroundings among smells and stenches. There are the stale vegetables now. Those potatoes are rotting. Smell them, damn you, smell them. And yet you dare to open the books, to listen to beautiful music, to learn to love beautiful paintings, to speak good English, to think thoughts that none of your own kind thinks, to tear yourself away from the oxen and the Lizzie Connollys and to love a pale spirit of a woman who is a million miles beyond you and who lives in the stars! Who are you? and what are you? damn you! And are you going to make good?”

“You have grudged the very fire in your house because the wood cost overmuch!" he cried. "You have grudged life. To live cost overmuch, and you have refused to pay the price. Your life has been like a cabin where the fire is out and there are no blankets on the floor." He signaled to a slave to fill his glass, which he held aloft. "But I have lived. And I have been warm with life as you have never been warm. It is true, you shall live long. But the longest nights are the cold nights when a man shivers and lies awake. My nights have been short, but I have slept warm”

“Thus it was that in obedience to the law laid down by his mother, and in obedience to the law of that unknown and nameless thing, fear, he kept away from the mouth of the cave.”