Deep in the forest a call was sounding, and as often as he heard this call, mysteriously thrilling and luring, he felt compelled to turn his back upon the fire and the beaten earth around it, and to plunge into the forest, and on and on, he knew not where or why; nor did he wonder where or why, the call sounding imperiously, deep in the forest.

Having no new companions, nothing remained for him but to read.

The pitch to which he was aroused was tremendous. All the fighting blood of his breed was up in him and surging through him. This was living., though he did not know it. He was realizing his own meaning in the world; he was doing that for which he was made.... He was justifying his existence, than which life can do no greater; for life achieves its summit when it does to the uttermost that which it was equipped to do.

A man with a club is a law-maker.

[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.

...in his gambling, he had one besetting weakness -- faith in a system; and this made his damnation certain.

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.