He leans against his house, but it won't stand; he grabs hold of it firmly, but it doesn't last.

He springs up like a flower and then withers. Like a shadow, he disappears and doesn't last.

"He won't become rich and his wealth won't last; he won't expand his holdings to cover the land.

Because nothing was left for him to devour, therefore his prosperity won't last.

“He builds his house like a spider’s web,
Like a (temporary) hut which a watchman makes.