He had learned well the law of club and fang, and he never forewent an advantage or drew back from a foe he had started on the way to Death. He had lessoned from Spitz, and from the chief fighting dogs of the police and mail, and knew there was no middle course. He must master or be mastered; while to show mercy was a weakness. mercy did not exist in the primordial life. It was misunderstood for fear, and such misunderstandings made for death. Kill or be killed, eat or be eaten, was the law; and this mandate, down out of the depths of Time, he obeyed.
He was mastered by the sheer surging of life, the tidal wave of being, the perfect joy of each separate muscle, joint, and sinew in that it was everything that was not death, that it was aglow and rampant, expressing itself in movement, flying exultantly under the stars.
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.
The fortunate man is the one who cannot take more than a couple of drinks without becoming intoxicated. The unfortunate wight is the one who can take many glasses without betraying a sign; who must take numerous glasses in order to get the ‘kick’.
The marriage tie becomes possessed of a history and takes to itself traditions. This history and these traditions form a great fund, to which changing conditions and growing imagination constantly add. And the traditions, more especially, bear heavily upon the individual, overmastering his natural expression of the love instinct and forcing him to an artificial expression of that love instinct. He loves, not as his savage forbears loved, but as his group loves.
It is a simple matter to see the obvious, to do the expected. The tendency of the individual life is to be static rather than dynamic, and this tendency is made into a propulsion by civilization, where the obvious only is seen, and the unexpected rarely happens. When the unexpected does happen, however, and when it is of sufficiently grave import, the unfit perish. They do not see what is not obvious, are unable to do the unexpected, are incapable of adjusting their well-grooved lives to other and strange grooves. In short, when they come to the end of their own groove, they die.
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.
But nobody else ever romped with White Fang. He did not permit it. He stood on his dignity, and when they attempted it, his warning snarl and bristling mane were anything but playful. That he allowed the master these liberties was no reason that he should be a common dog, loving here and loving there, everybody's property for a romp and good time. He loved with single heart and refused to cheapen himself or his love.
But this is not a world of free freights. One pays according to an iron schedule--for every strength the balanced weakness; for every high a corresponding low; for every fictitious god-like moment an equivalent time in reptilian slime. For every feat of telescoping long days and weeks of life into mad magnificent instants, one must pay with shortened life, and, oft-times, with savage usury added.