As A Native Speaker, Could You Check How Correct My Connotation Of The One American Soldier's Song Is?

[julliarder]

For a few months, I have been suffering from uncertainty about what the real meaning of the song called "Song of Poor Joe" is. The book "The Hawks of Hawk-Hollow: A Tradition of Pennsylvania," written by Robert Montgomery Bird, is a source where I found that song.
Link to the free online version of the book:
https://www.gutenberg.org/cache/epub/65637/pg65637-images.html
One of the sentences of the book, which introduces the song itself, goes, "He even began to sing along the road, and by the time he had reached the gate, was trolling a song, of a character ludicrous enough to come from his lips, but which, perhaps caught originally from those of some wag or philosopher of the camp, was now suggested by the spirit of happy indifference it breathed to all sublunary concerns, and was therefore in excellent harmony with his own feelings."
The full lyrics: 

I.

 

Poor Joe! I've no wealth but content at command,
    I am otherwise poor as a rat;
But while the world covets one's houses and land,
    I'm sure 'twill not rob me of that,
        Poor Joe!
    I'm sure 'twill not rob me of that.

 

II.

 

I've no money, no money to squander in wine,
    To aid me in soft'ning my lot:
But then, if the shame of a poor man be mine,
    The shame of a scoundrel shall not,
        Poor Joe!
    The shame of a scoundrel shall not.

 

III.

 

No sweetheart to flatter, no wife to applaud,—
    Poor Joe! he may house him or roam;
But, sure, if he meets with no angel abroad,
    He'll hap on no devil at home,
        Poor Joe!
    He'll hap on no devil at home.

 

IV.

 

Poor Joe! I've no friends, as, if richer, I might,
    But for that I'll not bitterly grieve;
If there's none, with the gabble of love, to delight,
    Why then there are none to deceive,
        Poor Joe!
    Why then there are none to deceive.

 

V.

 

Poor Joe! I am ragged, my hat is grown old,
    My elbows peep out to the storm;
But why should I fear for the wet and the cold,
    When content and a blanket can warm,
        Poor Joe!
    When content and a blanket can warm!


In the third and 4th verses of the lyrics, there are the lines, "But, sure, if he meets with no angel abroad, he'll hap on no devil at home," and "If there's none, with the gabble of love, to delight, why then there are none to deceive."
I can't get them at all. If you can only realize, then describe the full meaning widely, please.

In the 5th verse of the lyrics, what's the "content" that can warm him as well as a very real thing, like a "blanket"?

[calmck]

If "Content" is used as an adjective it means satisfied, pleased,happiness, fullfilled so being Content and having a blanket you will be warm.

[calmck]

Gabble is gibberish or prattle so if you are not in love you will not be deceived

[julliarder]

calmck, This book is from the first half of the 19th century, and I'm not sure we can declare with a greater perspective that "content" really was used as an adjective///

[calmck]

I said " if content is used"

just giving you my understanding of the song

[julliarder]

calmck, Now it's clear with the line of gabble. I don't believe that it can keep any other meaning. Agreed.