y has not man a microscopic eye?
For this plain reason, man is not a fly.
Say what the use, were finer optics given,
To inspect a mite, not comprehend the heaven?
Or touch, if tremblingly alive all o'er,
To smart and agonize at every pore?
Or quick effluvia darting through the brain,
Die of a rose in aromatic pain?
If Nature thundered in his opening ears,
And stunned him with the music of the spheres,
How would he wish that Heaven had left him still
The whispering zephyr, and the purling rill?
Who finds not Providence all good and wise,
Alike in what it gives, and what denies?
VII. Far as Creation's ample range extends,
The scale of sensual, mental powers ascends:
Mark how it mounts, to man's imperial race,
From the green myriads in the peopled grass:
What modes of sight betwixt each wide extreme,
The mole's dim curtain, and the lynx's beam:
Of smell, the headlong lioness between,
And hound sagacious on the tainted green:
Of hearing, from the life that fills the flood,
To that which warbles through the vernal wood:
The spider's touch, how exquisitely fine!
Feels at each thread, and lives along the line:
In the nice bee, what sense so subtly true
From poisonous herbs extracts the healing dew?
How instinct varies in the grovelling swine,
Compared, half-reasoning elephant, with thine!
'Twixt that, and reason, what a nice barrier,
For ever separate, yet for ever near!
Remembrance and reflection how allayed;
What thin partitions sense from thought divide:
And middle natures, how they long to join,
Yet never passed the insuperable line!
Without this just gradation, could they be
Subjected, these to those, or all to thee?
The powers of all subdued by thee alone,
Is not thy reason all these powers in one?
VIII. See, through this air, this ocean, and this earth,
All matter quick, and bursting into birth.
Above, how high, progressive life may go!
Around, how wide! how deep extend below?
Vast chain of being! which from God began,
Natures ethereal, human, angel, man,
Beast, bird, fish, insect, what no eye can see,
No glass can reach; from Infinite to thee,
From thee to nothing. On superior powers
Were we to press, inferior might on ours:
Or in the full creation leave a void,
Where, one step broken, the great scale's destroyed:
From Nature's chain whatever link you strike,
Tenth or ten thousandth, breaks the chain alike.
And, if each system in gradation roll
Alike essential to the amazing whole,
The leas
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