Dave Bonta's "Supposition" is built on a thought experiment. What if each of us carries a second presence, one that walks when we walk and sits when we sit? The speaker never insists on this idea. He keeps asking us to try it on, and the repeated "Suppose it's true" works like a hand held out, inviting us to imagine rather than believe. The poem is about the old human suspicion that the body houses something more than itself, and it ends by quietly asking whether that suspicion is even necessary.
The opening word choices are precise. The inner walker is "perfectly / coterminous" with the outer one, a word from geometry and law meaning that two things share exactly the same boundaries. The line break after "perfectly" makes the fit seem almost too exact. Then comes the image of the coal inside the ember, with the other self "weathering" us. "Weathering" is an unusual verb for a person. It suggests erosion, as if the inner presence were a climate working on a landscape, yet the ember image also hints at warmth and glow. The inner life is both wearing us down and keeping us lit.
The speaker has a personality, too. "I don't like to think that our bodies / are mere vessels — or vassals —" is the one moment he resists his own hypothesis. The near-rhyme of "vessels" and "vassals" is the poem's sharpest piece of sound-play. A vessel is a container and a vassal is a servant, so the pun gives the body two insults at once, a passive holder and a subordinate. His reluctance feels honest, which makes the "but suppose it's true" that follows more persuasive.
From there the poem shifts to "It might explain," a second formula that turns the hypothesis into a tool for understanding ordinary life. The "odd, apparently random urges / to hold & be held, or to lose ourselves / through concentration" become attempts at contact between two interiors: "the not-us within / wants to reach the not-us without." The pun on "without" is quietly clever. It means "outside," but it also carries a sense of lack, and the reaching is driven by both.
The most memorable writing comes in the aging passage. We "tighten around our cores," which makes growing old a kind of concentration instead of a decline. The details that follow are all small flashes of light: "strands of white," "an extra light" behind the eyes, and cracks in the skin through which we glimpse "an inner blue." Damage becomes an opening, and the body starts to let something through. Judging by the imagery, the blue is both the colour of veins beneath thin skin and a hint of sky, which prepares for the next line, "Suppose it's literally true / that heaven is within." The phrase echoes a familiar religious idea, and "literally" stakes a bold claim on it.
Then the poem turns. The last sentence is a question, and it undercuts everything before it: would even a literal inner heaven "be as illuminating as the knowledge / that we are risen from the ocean, / descended from the trees?" The two verbs run in opposite directions, up and down, which gives the line a sense of a long journey through time. It also reinterprets the opening. The "other" walking inside us may be our ancestry, the fish and the tree-climber still moving in our bodies. The supposition was a way of approaching a fact that is stranger than the guess.
Formally, the poem is free verse with no rhyme, apart from the buried echo of "vessels" and "vassals." Its rhythm is conversational, with sentences that spill across line breaks and pause on small words. The ampersands add a casual, handwritten feel. The long, accumulating syntax suits a mind thinking aloud, and the final question leaves the reader at the edge of the thought without an answer.
The poem is significant because it does not set science against spirituality. It treats the spiritual intuition with tenderness, gives it its best imagery, and then suggests that what we actually know about our origins may be more astonishing. It manages this in under twenty-five lines and without raising its voice.