i confess, i don't much read the words- it's too philosophical.

for every need that it satisfies, it creates a new need, and so,
instead of closing, like instinct, the round of action within
which the animal tends to move automatically, it lays open to
an activity an unlimited field into which it is driven further
and further, and made more and more free. but this advantage
of intelligence over instinct only appears at a late stage, when
intelligence, having raised construction to a higher degree, 
proceeds to construct constructive machinery. at the outset,
the advantages and drawbacks of the artificial instrument 
and of the natural instrument balance so well that it is hard to foretell
which of the two will secure to the living being the greater empire
over nature.

-henri bergson