A man pleads with someone who is already leaving, and what he asks for is not a cure but a pause. Herrick's address to his dying brother opens with the tender "Life of my life" and then turns oddly practical: "stay the time till we have bade good-night." The speaker knows he is bargaining from weakness. Death has "both wind and tide" with it, and it is "as soon dispatch'd... by the night as day", so it needs no schedule and no permission. The request is really about decency. Let us not "so rudely henceforth go." Dying is treated as a social occasion that deserves its proper rituals, and the poem is an attempt to rescue a farewell from the suddenness of death.
The list of those rituals is the most revealing moment in the first half: "wept, kiss'd, sigh'd, shook hands, or so." It begins with raw feeling and slides down to a handshake, then to the shrugging "or so". That casual tag sounds like a man trying to keep his voice steady by pretending the matter is small. Herrick lets the grief show through the understatement. The nautical "wind and tide" is a quiet image too. It makes the brother a traveller about to put out to sea, while the speaker stands on the shore bargaining over the minutes left.
The poem argues as much as it laments. "What? shall we two our endless leaves take here / Without a sad look, or a solemn tear?" is a half-indignant question, and "He knows not love that hath not this truth proved" is a bold maxim: love hates to let go. The form helps. The poem runs in ten rhymed couplets of iambic pentameter, and each pair tends to state a claim and close it, so the speaker's reasoning clicks shut line by line. The rhymes are plain and strong: flight with good-night, hell with farewell, here with tear. Even the pairing of "proved" and "beloved" looks like a rhyme on the page, though the vowels don't quite agree. That small unevenness suits the moment when the argument strains toward something it can't fully prove.
The turn comes with "Pay we our vows and go; yet when we part." The speaker accepts the departure, and the tone shifts from persuasion to gift. He will "bequeath" his heart, a word from wills and legal documents, into his brother's "loving hands". The legal vocabulary gives grief a formal shape, as if feeling could be settled like an inheritance. The gift also has a cost, because he will "keep none / To warm my breast". Calling William "my pulse" suggests that the brother was the rhythm keeping him alive, and that when the pulse goes, the body is left cold and empty.
The ending makes the strangest and most affecting move. The speaker, still alive, imagines becoming a ghost: "here I'll last, and walk, a harmless shade, / About this urn, wherein thy dust is laid." The roles reverse. The dying brother departs, and the living one becomes the restless spirit. "Harmless" is a gentle touch, since this is a ghost who has no wish to frighten anyone, only to watch. The urn is an image that feels more classical than English churchyard, and the poem gives the dust a surprising name, "those sacred seeds of thee". Seeds are what a plant leaves behind in order to grow, so the word hints, though the poem never states it, that something of William might survive.
The final word, "Heavy", is placed at the start of the last line, where it falls with real weight. Behind it lies the old wish that the earth should rest lightly on the dead. Here the speaker will be the one to keep every weight away.
The poem is significant because it keeps ceremony and sorrow together. It does not offer a theology of comfort or a tidy resolution. It gives instead a promise of loyalty, made in the plainest speech and the tightest form, from one person who cannot stop a death to the one who is dying.