Analysis of The Warning

We have seen mighty men ballooning high,
And in another moment bump the ground.
He falls; and in his measurement is found
To count some inches o'er the common fry.
'Twas not enough to send him climbing sky,
Yet 'twas enough above his fellows crowned,
Had he less panted. Let his faithful hound
Bark at detractors. He may walk or lie.
Concerns it most ourselves, who with our gas -
This little Isle's insatiable greed
For Continents--filled to inflation burst.
So do ripe nations into squalor pass,
When, driven as herds by their old private thirst,
They scorn the brain's wild search for virtuous light.