Reality and Image

FOR instance, when You think You see a
Fair Woman, 'tis but her Idea:
If You her real Lips Salute,
Or but their shade, will bear dispute.
"Look there (say You) I see a Horse" —
Lord Sir how Idly you discourse ?
"I see a Horse, I'm sure thats true."
I say the Devil a Horse see You;
You see a Horse's Image, lain
In Miniature upon your brain ;
But what you take for fourteen Hand,
Is less than half a grain of Sand.
Things must be stated by their Nature ;
The less cant comprehend the greater :
Now, if your Groom wou'd n'er be able
To set old Crop into the Stable,
Unless (pray mind) the Door at least
Was something larger than the beast :
The Fellow sure wou'd never be
Devoid of Sense to that Degree,
As to desire, much less to try,
To thrust his Nagg into your Eye,