Four short lines, and the whole poem turns on one odd image: the speaker's foot becomes a country. The title, "On the wrong foot," hints at being caught off balance, and the poem seems to start from that feeling. The foot is no longer a small body part but something huge, heavy, and strangely foreign.
The two similes set the tone. A god who is "out-of-order" is powerful but broken, like something grand that has stopped working. An egg is "melancholy," which is a surprising word for something so plain and round. Both images suggest slowness, stillness, and a quiet sadness. Then "this fat country / of my foot" lands with a mix of humor and gloom, as if the speaker is looking at their own foot with tired, affectionate bafflement.
The mood is wry and low-key: a little comic, a little sad. The speaker seems stuck, sluggish, and a bit out of step with themselves, though the poem never says why. That gap is part of its charm.