In what each differs, and in what agrees;
With quick Volitions unfatigued selects
Means for some end, and causes of effects;
All human science worth the name imparts,
And builds on Nature's base the works of Arts. 410

[Footnote: _Whence Reason's empire_, l. 401. The facility of
the use of the voluntary power, which is owing to the
possession of the clear ideas acquired by our superior sense
of touch, and afterwards of vision, distinguishes man from
brutes, and has given him the empire of the world, with the
power of improving nature by the exertions of art.

Reasoning is that operation of the sensorium by which we
excite two or many tribes of ideas, and then reexcite the
ideas in which they differ or correspond. If we determine
this difference, it is called judgment; if we in vain
endeavour to determine it, it is called doubting.

If we reexcite the ideas in which they differ, it is called
distinguishing. If we reexcite those in which they
correspond, it is called comparing.]

"The Wasp, fine architect, surrounds his domes
With paper-foliage, and suspends his combs;
Secured from frost the Bee industrious dwells,
And fills for winter all her waxen cells;
The cunning Spider with adhesive line
Weaves his firm net immeasurably fine;
The Wren, when embryon eggs her cares engross,
Seeks the soft down, and lines the cradling moss;
Conscious of change the Silkworm-Nymphs begin
Attach'd to leaves their gluten-threads to spin; 420
Then round and round they weave with circling heads
Sphere within Sphere, and form their silken beds.
--Say, did these fine volitions first commence
From clear ideas of the tangent sense;
From sires to sons by imitation caught,
Or in dumb language by tradition taught?
Or did they rise in some primeval site
Of larva-gnat, or microscopic mite;
And with instructive foresight still await
On each vicissitude of insect-state?-- 430
Wise to the present, nor to future blind,
They link the reasoning reptile to mankind!
--Stoop, selfish Pride! survey thy kindred forms,
Thy brother Emmets, and thy sister Worms!

[Footnote: _The Wasp, fine architect_, l. 411. Those animals
which possess a better sense of touch are, in general, more
i