A pool is a surprisingly good place to hide a sermon. Sarah A. Heinzerling's "Blue Pool" begins as pure landscape painting, with grass, water, sunlight and trees, and only in its last two lines reveals what the scenery has been building toward: a comparison between the pool's unfailing supply of water and "the love of God." The poem is worth reading closely precisely because the religious payoff feels earned rather than bolted on.
The first stanza sets the scene with a lightly playful touch. The pool's surface is "a mirror, lying", a small paradox, since mirrors are supposed to tell the truth. Here the reflection flatters the trees, which "bend to see / If summer gowns are fashioned / As robes of green should be." The trees become vain ladies checking their dresses, and the grass "fringe[s]" the pool like trim on fabric. Heinzerling keeps the clothing metaphor going across the whole stanza, so the natural world feels dressed up and a little theatrical. The word "lying" also hints at something the poem returns to later: what we see on the surface isn't the whole story.
The second stanza dives. The blues "spiral gently downward / In richer, darker hues", and the verbs do the work of a camera moving beneath the surface. Then the light arrives: "shafts of sunlight bold, / Pierce through that liquid sapphire, / And fleck the walls with gold." Jewel imagery takes over. The water is sapphire, the sunlight is gold, the paths are "marked by jewels." Notice, though, the contrast in verbs. "Spiral gently" is slow and soothing, while "pierce" is sudden and forceful. Light breaks into the calm like a bright intrusion, and the pool looks richer for it. A reader might sense a quiet preview of the ending, where something unseen and powerful sustains the scene from below.
The third stanza turns from looking to wondering. "Blue Pool is ever brimming / From some distant, hidden well; / Its depth no man has measured— / Its free source none can tell." The dash after "measured" gives the line a catch of breath, a moment of admitted ignorance. The pool's beauty is visible, but its origin is not. Then comes the pivot: "Yet, day by day, refreshing streams / Spring up to drench the sod." That "Yet" matters. Despite the mystery, the water keeps coming, and "drench" is a generous, almost extravagant verb. The final line names the point outright: the pool's "mystery and constancy" are "Like to the love of God." Both qualities carry weight. God's love, the poem suggests, is hidden in its source yet dependable in its effects, and it is unmeasured in depth and freely given.
Formally, the poem is tidy and song-like. Each stanza has eight lines, and the rhymes follow a pattern in which the second, fourth, sixth and eighth lines rhyme in pairs (pool/cool, see/be, blues/hues, bold/gold, and so on), while the odd-numbered lines go unrhymed. The meter is loose and conversational, roughly four stresses to a line, which keeps it flowing without sounding mechanical. Even the closing line doesn't break the pattern, which suits a poem about constancy: the form itself is steady and unhurried. The rhyme "well" and "tell" in the final stanza is especially neat, since it ties the physical well to the act of telling, and the poem admits that no one can tell where it comes from.
What makes the poem significant is its patience. It spends two full stanzas simply looking, trusting the reader to enjoy the mirror, the sapphire and the gold before any spiritual claim is made. When the comparison to God arrives, it feels like the natural conclusion of an argument the imagery has been making all along: that the most beautiful things are often sustained by sources we cannot see. For a reader today, the poem works even without belief, as a reminder that wonder usually begins with noticing.