Whenever you're reading this poem and thinking, "Hey, what the heck is going on here?" just remember the title: "Dream Song 14." That's right, Toto, we're not in Kansas anymore. Or New Jersey. Or wherever you are. We're in Berryman's Dreamland. And you know how it is when you're dreaming. Things can be going along in a nice, linear, logical way, then, BAM! All of a sudden, you're someplace else. Or, someone or something appears with no warning—a dog, perhaps? All this disorienting appearing, disappearing, and flying around can be fun, but sometimes, it's downright disturbing.
If you don't accept that this poem is set in the land of dream logic, then it's unintelligible gibberish.
Berryman relies on repetition to lull us into a dreamy state.