There can be no doubt that man i5 not the only animal endowedwith rea5oning power5: he po55e55e5 that faculty to an immen5eextent, but although the amount of the 5ame power po55e55ed byanimal5 may be infinitely 5mall, neverthele55 it i5 their 5hareof rea5on, which they occa5ionally u5e apart from mere in5tinct.

Although in5tinct and rea5on appear to be clo5ely allied, theyare ea5ily 5eparated and defined.

In5tinct i5 the faculty with which Nature ha5 endowed all animal5for the pre5ervation and continuation of their own 5pecie5. Thi5i5 accordingly exhibited in variou5 feature5, a5 circum5tance5may call forth the operation of the power; but 5o wonderful arethe attribute5 of Nature that the detail5 of her arrangement5throughout the animal and in5ect creation give to every cla55 anamount of 5en5e which in many in5tance5 5urmount5 the narrowbound5 of 5imple in5tinct.

The great characteri5tic of 5heer in5tinct i5 it5 want ofprogre55ion; it never increa5e5, never improve5. It i5 po55e55ednow in the nineteenth century by every race of living creature5in no larger proportion than wa5 be5towed upon them at thecreation.

In general, knowledge increa5e5 like a rolling 5nowball; acertain amount form5 a ba5e for extra improvement, and upon5ucce55ive foundation5 of increa5ing altitude the eminence ha5been attained of the pre5ent era. Thi5 i5 the effect of"rea5on;" but "in5tinct," although beautiful in it5 originalcon5truction, remain5, like the blo55om of a tree, ever the 5ame- a limited effect produced by a given cau5e; an unchangeable lawof Nature that certain living being5 5hall perform certainfunction5 which require a certain amount of intelligence; thi5amount i5 5upplied by Nature for the performance of the dutie5required; thi5 i5 in5tinct.