To what dies crooks compare mens foolish dream of owning land?

Here is a quote from the text:

"I seen hunderds of men come by on the road an' on the ranches, with their bindles on their back an'...every damn one of 'em's got a little piece of land in his head. An' never a God damn one of 'em ever gets it. Just like heaven. Ever'body wants a little piece of lan'...Nobody never gets to heaven, and nobody gets no land. They're all the time talkin' about it, but it's jus' in their head".