Shelley takes the quietest hour of a summer day and asks whether it can change how we feel about dying. The subtitle places the scene in a churchyard at Lechlade, in Gloucestershire, and the poem follows the fading light across it: from a sky swept clear of vapour, to a dark glen, to a church spire, and finally down to the graves. By the last stanza the evening has made death "mild / And terrorless". But the speaker is careful about how far he trusts that feeling.
The opening works through personification. Evening is a pale figure who "twines its beaming hair / In duskier braids around the languid eyes of Day", so sunset looks like someone being lulled to sleep. Silence and Twilight, "unbeloved of men", creep "hand in hand" out of the glen. They are things people usually avoid, yet the poem treats them tenderly, almost like shy companions. Sleep becomes the poem's hidden thread. Day's drooping eyes lead to the dead "sleeping in their sepulchres", then to death's "breathless sleep" and its "loveliest dreams". The metaphor persuades quietly, long before the speaker says anything directly about death.
The church tower is where the poem lifts off the ground. Shelley calls it an "aereal Pile", and its pinnacles "Point from one shrine like pyramids of fire", still catching light the earth has lost. The spire is "lessening and invisible", and the clouds of night gather around it "among the stars". A solid building is turning into something close to weightless.
The fourth stanza is the hinge, and it is blunt. The dead are "mouldering" in "wormy beds", and Shelley does not look away from that. Yet from them rises "a thrilling sound, / Half sense, half thought", which mixes with the night until "Its awful hush is felt inaudibly". The paradox of a sound you cannot hear suits the whole poem, and "awful" here carries its older sense of "full of awe". The comfort does not come from denying decay. It comes from a mood in which decay and wonder sit side by side.
The form supports this slowing, settling effect. Each stanza is six lines rhymed ABABCC, with a closing couplet that clicks shut like a latch. Most lines are iambic pentameter, but the fourth line of every stanza stretches to twelve syllables and six beats. "Breathed from their wormy beds all living things around" is one example. Those longer lines feel like a held breath let out, before the couplet pulls things back to normal length. Some rhymes are only approximate, such as "pinnacles" with "spells" and "sepulchres" with "stirs". The slight looseness suits a poem about half-seen, half-heard things.
The final stanza turns on its verbs. The speaker does not say death is gentle. He says, "Here could I hope", and the conditional matters. The picture he reaches for is "some inquiring child / Sporting on graves", curious and unafraid where adults would be solemn. He offers two possibilities: that death hides "Sweet secrets", or that dreams keep "perpetual watch" beside the sleeper. The word "Here" ties the consolation to this place and this hour, and it may not last once daylight returns.
That restraint is what makes the poem worth reading. It refuses both terror and easy faith. It lets the beauty of one evening shift a person's feelings about mortality, and it admits that the shift is a hope, not a proof. For a reader, the pleasure lies in watching the calm being earned: Shelley looks at the worms before he allows himself the dreams.