Kill or be killed, eat or be eaten, was the law; and this mandate, down out of the depths of Time.

Of her own experience she had no memory of the thing happening; but in her instinct, which was the experience of all mothers of wolves, there lurked a memory of fathers that had eaten their new-born and helpless progeny.

Man is man because he chanced to develop intelligence instead of instinct; otherwise he would to this day have remained among the anthropoid apes. He has turned away from nature, become unnatural, as it were, disliked the earth upon which he found himself, and changed the face of it somewhat to his liking.

He was always striving to attain it. The life that was so swiftly expanding within him, urged him continually toward the wall of light. The life that was within him knew that it was the one way out, the way he was predestined to tread.

In a saturated population life is always cheap.

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.

The great task demanded of man is reproduction. He is urged by passion to perform this task. Passion, working through the imagination, produces love. Passion is the impelling factor, imagination the disturbing factor; and the disturbance of passion by imagination produces love.