Carl Sandburg, the Illinois poet who made Chicago’s factories and railroads into myth, published “Let Love Go On” in his 1920 collection *Smoke and Steel*. The era matters: after the First World War and amid rapid industrial acceleration, many modernists were writing about fragmentation and loss. Sandburg responds with a voice that is both tough and tender, a plainspoken incantation rather than a decorative love lyric.
The poem’s argument is simple but uneasy. Love should be “poured out” completely, until “all the answers are made, the last dollar spent and the last blood gone.” That is a startling way to talk about affection—love as total expenditure, like money or blood. Sandburg never pretends that love can defeat time. In fact, he insists the opposite: “time gets by, time wins.” Yet the repeated command “let love go on” turns that defeat into a reason to keep going. The central idea is not that love conquers all, but that love is an ongoing act of spending and renewal in the face of an opponent who always wins.
The construction reinforces this tension. The poem is free verse, with no regular rhyme scheme, but its rhythm comes from repetition and parallelism. “Time runs with an ax and a hammer, time slides down the hallways with a pass-key and a master-key, and time gets by, time wins.” That sentence moves with a runner’s momentum, piling clause upon clause. The word “time” echoes like a drumbeat, while “let” begins each stanza as a kind of prayer or permission. Sandburg’s lines stretch and pause irregularly, so the poem sounds spoken rather than sung, intimate rather than formal.
Imagery gives time a body and a temper. It carries an ax and a hammer, tools of both building and breaking. It slides down hallways with a pass-key and a master-key, meaning no door stays locked against it. Later, time becomes “a young man with ballplayer legs,” racing life and clocks, then “tickles with rust and spots.” That last image is especially unsettling: after all that speed and violence, time also works quietly, like corrosion on metal or spots on skin. Against this, Sandburg places one luminous image of love: the lovers, their oaths and children and people, should be “clean as a washed stone under a waterfall in the sun.” The stone suggests endurance, but also humility—something worn smooth by forces beyond its control.
The final stanza shifts to measurement and risk. “The heartbeats are measured out with a measuring glass, so many apiece to gamble with, to use and spend and reckon.” Here love is not a feeling but a finite resource, almost like money or liquor, and the verbs belong to a card game or a ledger. That is very Sandburg: he refuses to romanticize love into something limitless. Instead, he treats it as valuable precisely because it is limited. The poem closes by repeating its opening command, but now the words carry the weight of that measured glass. “Let love go on” is no longer just a wish; it is a decision made with full knowledge of the odds.
What makes “Let Love Go On” significant is this refusal to offer comfort at the expense of honesty. Many poems about love lean on permanence or destiny. Sandburg’s poem does neither. It admits that time wins and that every heartbeat is counted, yet still urges love forward. That combination of clear-eyed mortality and stubborn tenderness gives the poem its staying power for school readers: it treats love as an act of courage, not a guarantee.