Five short lines, a single sentence, and a title that seems to contradict what follows. "Rose-colored glasses" is the idiom for seeing the world through naive optimism, for looking at things as lovelier than they are. The speaker, though, is not naive at all. He saw something beautiful begin, and he is honest that he cannot say how it will go.
The poem's subject is the early, hopeful stage of love, pictured as ships leaving harbour. "I saw the ships set off / at the beginning of love" offers a scene of departure and promise. Ships are plural and general; we never learn where they are headed or whose they are. They work less as a literal image than as a picture of hopes launched all at once. The speaker stands at a distance, watching them go. The rose-colored glasses of the title may explain why the scene is so appealing. Rose is also the color of early light, so we can imagine these ships sailing off into a pink dawn, a view the speaker knows is flattering.
The turn comes in the third line, "but I know not." It is the shortest line before the final one, and the break after "not" makes the reader stop on the admission. The wording is also striking. "I know not" is old-fashioned, the kind of phrase you would expect in a sea ballad or a prayer, where a modern speaker would say "I don't know." That formal register lends the doubt some dignity. It sounds less like a shrug than like someone accepting that the future is out of his hands.
What he does not know is small and specific: "whether I shall see / a dolphin." Here the poem's best move appears. After the grand setting of love, ships and departures, the speaker does not worry about whether the voyage will succeed, whether the ships will reach harbour, or whether the love will last. He wonders whether he will see one animal. Dolphins are traditionally linked with sailors and are often thought of as a happy sign at sea, so the image suggests a moment of unexpected delight, a gift rather than a goal. The speaker seems to understand that love is mostly made of such moments, which cannot be promised or planned. The singular "a dolphin" sets itself against the plural "ships," so something rare and single answers the crowd of hopes.
The poem's craft is spare. There is no rhyme; "off" and "love" sit at the ends of the first two lines without echoing each other, and "see" and "dolphin" do not match either. The rhythm is loose and close to speech, with lines of roughly four to seven syllables. The poem is built instead on repeated sight words. "Saw" in the first line becomes "see" in the fourth, and both link back to the glasses of the title. A poem about looking is framed by an object that changes how we look. The shift in tense does the same work: the past ("I saw") is certain, while the future ("I shall see") is not. The speaker can say what he witnessed but cannot promise what he will witness, and the grammar carries that gap.
The ending is gentle. The last line, "a dolphin," finishes on an unstressed syllable and a period, not a question mark, so the poem does not demand an answer. It simply stops, with the possibility hanging in the air. That restraint fits its meaning. A louder ending would have claimed too much.
The poem is significant for how much it holds in so little space. The title suggests that optimism distorts, and the poem answers that one can keep the glasses on and still see clearly. The speaker admits the beauty of beginnings, admits his uncertainty, and lowers his hopes to something modest and real. Hoping for a dolphin rather than a safe arrival is a quietly mature attitude to love. For a reader, the poem shows that a very short text can contradict its own title, change its tone in one line and leave a lasting image, all without explaining itself.