of the cave. The
cub knew only that the sniff was strange, a something unclassified,
therefore unknown and terrible--for the unknown was one of the chief
elements that went into the making of fear.

The hair bristled upon the grey cub's back, but it bristled silently. How
was he to know that this thing that sniffed was a thing at which to
bristle? It was not born of any knowledge of his, yet it was the visible
expression of the fear that was in him, and for which, in his own life,
there was no accounting. But fear was accompanied by another
instinct--that of concealment. The cub was in a frenzy of terror, yet he
lay without movement or sound, frozen, petrified into immobility, to all
appearances dead. His mother, coming home, growled as she smelt the
wolverine's track, and bounded into the cave and licked and nozzled him
with undue vehemence of affection. And the cub felt that somehow he had
escaped a great hurt.

But there were other forces at work in the cub, the greatest of which was
growth. Instinct and law demanded of him obedience. But growth demanded
disobedience. His mother and fear impelled him to keep away from the
white wall. Growth is life, and life is for ever destined to make for
light. So there was no damming up the tide of life that was rising
within him--rising with every mouthful of meat he swallowed, with every
breath he drew. In the end, one day, fear and obedience were swept away
by the rush of life, and the cub straddled and sprawled toward the
entrance.

Unlike any other wall with which he had had experience, this wall seemed
to recede from him as he approached. No hard surface collided with the
tender little nose he thrust out tentatively before him. The substance
of the wall seemed as permeable and yielding as light. And as condition,
in his eyes, had the seeming of form, so he entered into what had been
wall to him and bathed in the substance that composed it.

It was bewildering. He was sprawling through solidity. And ever the
light grew brighter. Fear urged him to go back, but growth drove him on.
Suddenly he found himself at the mouth of the cave. The wall, inside
which he had thought himself, as suddenly leaped back before him to an
immeasurable distance. The light had become painfully bright. He was
dazzled by it. Likewise he was made dizzy by this abrupt and tremendous
extension of space. Automatically, his eyes were adjusting themselves to
the brightness, focu