Three stanzas, three women. The first is dark and passionate, and offers pleasure; the second, pale and gold-braided, offers tenderness and happiness. To both he answers no. The third is not of flesh: she is «a dream, an impossibility, a vain phantom of mist and light».
And to her, the one who cannot be had, he says: «Oh, come; come, you!». In twelve lines Bécquer sums up his whole poetics: against real pleasure and real happiness, the poet chooses the unreachable, because it is precisely the impossible that kindles desire.
The verse is kept in Spanish. Translating it in passing would replace the work with a paraphrase of it.