But it is never sure of holdin' that dominance.

An 'if wind or storm or a strong-growin' rival does not overthrow it, then sooner or later old age will.

For there is absolute and continual fight.

What is true of these aspens is true of all the trees in the forest an' of all plant life in the forest.

What is most wonderful to me is the tenacity of life." And next day Dale showed them an even more striking example of this mystery of nature.
He guided them on horseback up one of the thick, verdant-wooded slopes, calling their attention at various times to the different growths, until they emerged on the summit of the ridge where the timber grew scant and dwarfed.